The basic form of the rabbi developed in the Pharisaic and Talmudic era, when learned teachers assembled to codify Judaism's written and oral laws. The title "rabbi" was first used in the first century CE. In more recent centuries, the duties of a rabbi became increasingly influenced by the duties of the Protestant Christian minister, hence the title "pulpit rabbis", and in 19th-century Germany and the United States rabbinic activities including sermons, pastoral counseling, and representing the community to the outside, all increased in importance.
Within the various Jewish denominations, there are different requirements for rabbinic ordination, and differences in opinion regarding who is recognized as a rabbi. For example, most Orthodox Jewish communities do not accept nor ordain women rabbis. Non-Orthodox movements have chosen to do so for what they view as halakhic reasons (Conservative Judaism) as well as ethical reasons (Reform and Reconstructionist Judaism).
The word "rabbi" is derived from the Hebrew word rav ['?av], which literally means "great one" or "master". The form of the title in English and many other languages derives from the possessive form in Hebrew of rav: rabbi ['?abi], meaning "my master", which is how a student would address a superior. The title gained an irregular plural form: (rabbanim [?aba'nim]), rather than rabbay ("my masters"). In the third person one could say ha-rav ("the master") or rabbo ("his master"); the world rav itself is also used as a title for rabbis, as are rabbeinu ("our master") and ha-rav.
The root first occurs in TaNaK in chapter 1 of the Book of Genesis, in verbal form, Hebrew: ?, romanized: peru u rebu, lit. 'be fruitful and multiply' This phrase is interpreted by the sages of blessed memory, to mean "bear children, and raise them (or to make them great)". This mitzvah (commandment) of "raising" is given to fathers, but can be partially fulfilled through agency by appointing a mentor. "Rov" is a verb meaning "to raise" or to "make great", and the "Rav" is one who consciously takes on the role of "raising" sons, by teaching them the Torah, the law. Thus the Rav, the rabbi, is like a second father. A Jewish father is also obliged also to teach his son a practical trade whereby he may support himself and a family, and to teach him to swim. 
The word rav in turn derives from the Semitic root ?-?-? (R-B-B), which in Biblical Aramaic means "great" in many senses, including "revered", but appears primarily as a prefix in construct forms. Although the usage rabbim "many" (as 1 Kings 18:25, ) "the majority, the multitude" occurs for the assembly of the community in the Dead Sea Scrolls, there is no evidence to support an association with the later title "rabbi". The root is cognate to Arabic rabb, meaning "lord" (generally used when talking about God, but also about temporal lords), and to the Syriac word rabi.
Sephardic and Yemenite Jews have historically pronounced this word ribb? rather than "rabbi", and this pronunciation also appears in the Talmud and in Ashkenazi texts prior to the late 18th century. The modern Israeli pronunciation rabi, and the English word "rabbi", are derived from an 18th-century innovation in Ashkenazic prayer books, although this vocalization is also found in some ancient sources. Other variants are r?v? and, in Yiddish, rebb?.
A rabbi is not an occupation found in the Hebrew Bible, and ancient generations did not employ related titles such as Rabban, Rabbi, or Rav to describe either the Babylonian sages or the sages in Israel. For example, Hillel I and Shammai (the religious leaders of the early first century) had no rabbinic title prefixed to their names. The titles "Rabban" and "Rabbi" are first mentioned in Jewish literature in the Mishnah. Rabban was first used for Rabban Gamaliel the elder, Rabban Simeon his son, and Rabban Yohanan ben Zakkai, all of whom were patriarchs or presidents of the Sanhedrin in the first century. Early recipients of the title rabbi include Rabbi Zadok and Rabbi Eliezer ben Jacob, beginning in the time of the disciples of Rabban Yohanan ben Zakkai. The title "Rabbi" occurs (in Greek transliteration rhabbi) in the books of Matthew, Mark, and John in the New Testament, where it is used in reference to "Scribes and Pharisees" as well as to Jesus. According to some, the title "rabbi" or "rabban" was first used after 70 CE to refer to Yochanan ben Zakkai and his students, and references in rabbinic texts and the New Testament to rabbis earlier in the 1st century are anachronisms or retroactive honorifics. Other scholars believe that the term "rabbi" was a well-known informal title by the beginning of the first century CE, and thus that the Jewish and Christian references to rabbis reflect the titles in fact used in this period.
The governments of the kingdoms of Israel and Judah were based on a system that included the Jewish kings, the Jewish prophets, the legal authority of the high court of Jerusalem, the Great Sanhedrin, and the ritual authority of the priesthood. Members of the Sanhedrin had to receive their ordination (semicha) in an uninterrupted line of transmission from Moses, yet rather than being referred to as rabbis they were called priests or scribes, like Ezra, who is called in the Bible "Ezra, the priest, the scribe, a scribe of the words of God's commandments and of His statutes unto Israel." "Rabbi" as a title does not appear in the Hebrew Bible, though later rabbinic sources occasionally use it as a title for wise Biblical figures.
With the destruction of the two Temples in Jerusalem, the end of the Jewish monarchy, and the decline of the dual institutions of prophets and the priesthood, the focus of scholarly and spiritual leadership within the Jewish people shifted to the sages of the Men of the Great Assembly (Anshe Knesset HaGedolah). This assembly was composed of the earliest group of "rabbis" in the more modern sense of the word, in large part because they began the formulation and explication of what became known as Judaism's "Oral Law" (Torah SheBe'al Peh). This was eventually encoded and codified within the Mishnah and Talmud and subsequent rabbinical scholarship, leading to what is known as Rabbinic Judaism.
From the 1st to 5th centuries, the title "Rabbi" was given to those sages of the Land of Israel who received formal ordination (semicha), while the lesser title "Rav" was given to sages who taught in the Babylonian academies, as ordination could not be performed outside the Land of Israel. (However, another opinion holds that "Rabbi" and "Rav" are the same title, pronounced differently due to variations in dialect.) Sherira Gaon summarized the relationship between these titles as follows: "Rabbi is greater than Rav, Rabban is greater than Rabbi, one's name is greater than Rabban".
After the suppression of the Patriarchate and Sanhedrin by Theodosius II in 425, there was no more formal ordination in the strict sense. A recognised scholar could be called Rav or Hacham, like the Babylonian sages. The transmission of learning from master to disciple remained of tremendous importance, but there was no formal rabbinic qualification as such.
In the early Middle Ages "rabbi" was not a formal title, but was used as a term of respect for Jews of great scholarship and reputation. After the emergence of Karaism, Jews who still followed the Talmudic traditions became known as "rabbanites". Initially communities might have a religious judge appointed by the central geonate, often possessing a certification known as pitka dedayanuta or bearing the title chaver (short for chaver besanhedrin hagedolah, used in Israel) or aluf (used in Babylonia). By the 11th century, as the geonate weakened it was common for Jewish communities to elect a local spiritual authority. In the 11-12th century, some local rabbinic authorities in Spain received formal certification known as ketav masmich or ketav minui in preparation for their leadership role.Maimonides ruled that every congregation is obliged to appoint a preacher and scholar to admonish the community and teach Torah, and the social institution he describes is the germ of the modern congregational rabbinate.
Until the Black Death, Ashkenazi communities typically made religious decisions by consensus of scholars on a council, rather than the decision of a single authority. In the 14th century, the concept arose of a single person who served as religious authority for particular area (the mara de'atra). Formal ordination is first recorded among Ashkenazim with Meir ben Baruch Halevi (late 14th century), who issued the formal title Moreinu (our teacher) to scholars, though it likely existed somewhat earlier. By the 15th century, this formal ordination (known as semicha) became necessary in order to be recognized as a rabbi. Initially some Sephardic communities objected to such formal ordination, but over time the system became adopted by them too.:13
A dramatic change in rabbinic functions occurred with Jewish emancipation. Tasks that were once the primary focus for rabbis, such as settling disputes by presiding over a Jewish court, became less prominent, while other tasks that were secondary, like delivering sermons, increased in importance.
In 19th-century Germany and the United States, the duties of the rabbi in some respects became increasingly similar to the duties of other clergy, like the Protestant Christian minister, and the title "pulpit rabbis" appeared to describe this phenomenon. Sermons, pastoral counseling, representing the community to the outside, all increased in importance. Non-Orthodox rabbis, on a day-to-day business basis, now spend more time on these functions than they do teaching or answering questions on Jewish law and philosophy. Within the Modern Orthodox community, many rabbis still mainly deal with teaching and questions of Jewish law, but many are increasingly dealing with these same pastoral functions.
Traditionally, rabbis have never been an intermediary between God and humans. This idea was traditionally considered outside the bounds of Jewish theology. Unlike spiritual leaders in many other faiths, they are not considered to be imbued with special powers or abilities.
Rabbis serve the Jewish community. Hence their functions vary as the needs of the Jewish community vary over time and from place to place.
In antiquity those who performed rabbinic functions, such as judging a case or teaching Torah to students, did not receive compensation for their services. Being a rabbi was not a full-time profession and those who served had other occupations to support themselves and their families, such as woodchopper, sandal-maker, carpenter, water-carrier, farmer and tanner. A respected scholar, Rabbi Zadok (1st cent. CE), had said "never to use the Torah as a spade for digging," and this was understood to mean never to use one's Torah knowledge for an inappropriate purpose, such as earning a fee. Still, as honored members of the community, Torah sages were allowed a series of privileges and exemptions that alleviated their financial burdens somewhat. These included such things as tax exemption from communal levies, marketplace priority (first in, first out regarding their trade), receiving personal services from their students (shimush talmedei hakhamim), silent business partnerships with wealthy merchants, and a substitute fee to replace their lost earnings when they had to leave work to perform a rabbinic function (sekhar battalah).
During the period of the Geonim (c. 650-1050 CE), opinions on compensation shifted. It was deemed inappropriate for the leaders of the Jewish community to appear in the marketplace as laborers or vendors of merchandise, and leading a Jewish community was becoming a full-time occupation. Under these conditions, the Geonim collected taxes and donations at home and abroad to fund their schools (yeshivot) and paid salaries to teachers, officials and judges of the Jewish community, whom they appointed.Maimonides (1135-1204), who supported himself as a physician, reasserted the traditional view of offering rabbinic service to the Jewish community without compensation. It remains the ideal. But circumstances had changed. Jewish communities required full-time rabbis, and the rabbis themselves preferred to spend their days studying and teaching Torah rather than working at a secular trade.
By the fifteenth century it was the norm for Jewish communities to compensate their rabbis, although the rabbi's contract might well refer to a "suspension fee" (sekhar battalah) rather than a salary, as if he were relinquishing a salary from secular employment. The size of salaries varied, depending on the size of the community served, with rabbis in large cities being well-compensated while rabbis in small towns might receive a small stipend. Rabbis were able to supplement their rabbinic incomes by engaging in associated functions and accepting fees for them, like serving as the community's scribe, notary and archivist, teaching in the elementary school or yeshivah, publishing books, arbitrating civil litigations, or even serving as a matchmaker.
With the formation of rabbinical seminaries starting in the nineteenth century, the rabbinate experienced a degree of professionalization that is still underway. At the present time, an ordained graduate of a rabbinical seminary that is affiliated with one of the modern branches of Judaism, Reform, Conservative, Reconstructionist, or modern Orthodox, will find employment--whether as a congregational rabbi, teacher, chaplain, Hillel director, camp director, social worker or administrator--through the placement office of his or her seminary. Like any modern professional, he or she will negotiate the terms of employment with potential employers and sign a contract specifying duties, duration of service, salary, benefits, pension and the like. A rabbi's salary and benefits today tend to be similar to those of other modern professionals, such as lawyers and accountants, with similar levels of post-graduate education. It is also possible to engage in the rabbinate part-time, e.g. at a synagogue with a small membership; the rabbi's salary will be proportionate to the services rendered and he or she will likely have additional employment outside the synagogue.
Acceptance of rabbinic credentials involves both issues of practicality and principle. As a practical matter, communities and individuals typically tend to follow the authority of the rabbi they have chosen as their leader (called by some the mara d'atra) on issues of Jewish law. They may recognize that other rabbis have the same authority elsewhere, but for decisions and opinions important to them they will work through their own rabbi.
The rabbi derives authority from achievements within a meritocratic system. Rabbis' authority is neither nominal nor spiritual -- it is based on credentials. Typically the rabbi receives an institutional stamp of approval. It is this authority that allows them to engage in the halakhic process and make legal prescriptions.
The same pattern is true within broader communities, ranging from Hasidic communities to rabbinical or congregational organizations: there will be a formal or de facto structure of rabbinic authority that is responsible for the members of the community. However, Hasidic communities do not have a mere rabbi: they have a Rebbe, who plays a similar role but is thought to have a special connection to God. The Rebbes' authority, then, is based on a spiritual connection to God and so they are venerated in a different way from rabbis.
According to the Talmud, it is a commandment (mitzvah) to honor a rabbi and a Torah scholar, along with the elderly, as it is written in Leviticus 19:32, "Rise up before the elderly, and honor the aged." One should stand in their presence and address them with respect.Kohanim (priests) are required to honor rabbis and Torah scholars like the general public. However, if one is more learned than the rabbi or the scholar there is no need to stand. The spouse of a Torah scholar must also be shown deference. It is also a commandment for teachers and rabbis to honor their students. Rabbis and Torah scholars, in order to ensure discipline within the Jewish community, have the authority to place individuals who insult them under a ban of excommunication.
The first chapter of the Ethics of the Fathers gives the line of succession from the "men of the Great Assembly through the Tannaim." This is the Masorah, the "transmission". "Masorti" is translated "conservative", but it literally means that they "transmit the tradition".
True semikhah was lost somewhere after the period of the Amoraim during the period of the Gaonim. According to the Maimonides, if it were possible to gather the greatest sages of the generation, a reconstituted court could confer classic semikhah or ordination, that would carry the same authority as in ages past, of those who "sit in Moses seat".
On the basis of Maimonides's opinion, Jacob Berab reinstituted a court in Safed to expunge the sins that came together with apostasy in the wake of the Spanish Inquisition. Although its authority did not extend beyond one generation of scholars, it gave semikhah to 4 talmidim; one of these students was R. Joseph Karo, the author of the Shulchan Aruch
A rabbinical student is awarded semikhah (rabbinic ordination) after the completion of a learning program in a yeshiva or modern rabbinical seminary or under the guidance of an individual rabbi. The exact course of study varies by denomination, but most are in the range of 3-6 years. The programs all include study of Talmud, the codes of Jewish law and responsa to a greater or lesser extent, depending on the branch of Judaism. In addition to rabbinical literature, modern seminaries offer courses in pastoral subjects such as counseling, education, comparative religion and delivering sermons. Most rabbinical students will complete their studies in their mid-20s. There is no hierarchy and no central authority in Judaism that either supervises rabbinic education or records ordinations; each branch of Judaism regulates the ordination of the rabbis affiliated with it.
The most common formula used on a certificate of semikhah is Yore yore ("He may teach, he may teach", sometimes rendered as a question and answer, "May he teach? He may teach."). Most Rabbis hold this qualification; they are sometimes called a moreh hora'ah ("a teacher of rulings"). A more advanced form of semikhah is yadin yadin ("He may judge, he may judge" or "May he judge? He may judge."). This enables the recipient to serve as a judge on a rabbinical court and adjudicate cases of monetary law, among other responsibilities. The recipient of this ordination can be formally addressed as a dayan ("judge") and also retain the title of rabbi. Only a small percentage of rabbis earn the yadin yadin ordination. Although not strictly necessary, many Orthodox rabbis hold that a beth din (court of Jewish law) should be made up of dayanim with this ordination.
An Orthodox semikhah requires the successful completion of a program encompassing Jewish law and responsa in keeping with longstanding tradition. Orthodox rabbinical students work to gain knowledge in Talmud, Rishonim and Acharonim (early and late medieval commentators) and Jewish law. They study sections of the Shulchan Aruch (codified Jewish law) and its main commentaries that pertain to daily-life questions (such as the laws of keeping kosher, Shabbat, and the laws of family purity). See: Yeshiva § Talmud study and Yeshiva § Jewish law; Semikhah § Concept; Posek § Formulating a ruling (psak din); and List of rabbinical schools § Orthodox.
Orthodox rabbis typically study at yeshivas, which are dedicated religious schools. Modern Orthodox rabbinical students, such as those at Yeshiva University, study some elements of modern theology or philosophy, as well as the classical rabbinic works on such subjects (see Yeshiva § Ethics, mysticism and philosophy).
The entrance requirements for an Orthodox yeshiva include a strong background within Jewish law, liturgy, Talmudic study, and attendant languages (e.g., Hebrew, Aramaic and in some cases Yiddish). Specifically, students are expected to have acquired deep analytic skills, and breadth, in Talmud before commencing their rabbinic studies. At the same time, since rabbinical studies typically flow from other yeshiva studies, those who seek semichah are typically not required to have completed a university education. Exceptions exist, such as Yeshiva University, which requires all rabbinical students to complete an undergraduate degree before entering the program, and a Masters or equivalent before ordination.
Historically, women could not become Orthodox rabbis. Starting in 2009, some Modern Orthodox institutions began ordaining women with the title of "Maharat", and later with titles including "Rabbah" and "Rabbi". This is currently a contested issue for many Orthodox institutions, leading some to seek alternate clerical titles and roles for women (see Women rabbis and Torah scholars § Orthodox Judaism, and Yoetzet Halacha).
While some Haredi (including Hasidic) yeshivas (also known as "Talmudical/Rabbinical schools or academies") do grant official ordination to many students wishing to become rabbis, most of the students within the yeshivas engage in learning Torah or Talmud without the goal of becoming rabbis or holding any official positions. The curriculum for obtaining ordination as rabbis for Haredi scholars is the same as described above for all Orthodox students wishing to obtain the official title of "Rabbi" and to be recognized as such.
Within the Hasidic world, the positions of spiritual leadership are dynastically transmitted within established families, usually from fathers to sons, while a small number of students obtain official ordination to become dayanim ("judges") on religious courts, poskim ("decisors" of Jewish law), as well as teachers in the Hasidic schools. The same is true for the non-Hasidic Litvish yeshivas that are controlled by dynastically transmitted rosh yeshivas and the majority of students will not become rabbis, even after many years of post-graduate kollel study.
Some yeshivas, such as Yeshivas Chafetz Chaim and Yeshivas Ner Yisroel in Baltimore, Maryland, may encourage their students to obtain semichah and mostly serve as rabbis who teach in other yeshivas or Hebrew day schools. Other yeshivas, such as Yeshiva Chaim Berlin (Brooklyn, New York) or the Mirrer Yeshiva (in Brooklyn and Jerusalem), do not have an official "semichah/rabbinical program" to train rabbis, but provide semichah on an "as needed" basis if and when one of their senior students is offered a rabbinical position but only with the approval of their rosh yeshivas.
Haredim will often prefer using Hebrew names for rabbinic titles based on older traditions, such as: Rav (denoting "rabbi"), HaRav ("the rabbi"), Moreinu HaRav ("our teacher the rabbi"), Moreinu ("our teacher"), Moreinu VeRabeinu HaRav ("our teacher and our rabbi/master the rabbi"), Moreinu VeRabeinu ("our teacher and our rabbi/master"), Rosh yeshiva ("[the] head [of the] yeshiva"), Rosh HaYeshiva ("head [of] the yeshiva"), "Mashgiach" (for Mashgiach ruchani) ("spiritual supervsor/guide"), Mora DeAsra ("teacher/decisor" [of] the/this place"), HaGaon ("the genius"), Rebbe ("[our/my] rabbi"), HaTzadik ("the righteous/saintly"), "ADMOR" ("Adoneinu Moreinu VeRabeinu") ("our master, our teacher and our rabbi/master") or often just plain Reb which is a shortened form of rebbe that can be used by, or applied to, any married Jewish male as the situation applies.
Note: A rebbetzin (a Yiddish usage common among Ashkenazim) or a rabbanit (in Hebrew and used among Sephardim) is the official "title" used for, or by, the wife of any Orthodox, Haredi, or Hasidic rabbi. Rebbetzin may also be used as the equivalent of Reb and is sometimes abbreviated as such as well.
Conservative Judaism confers semikhah after the completion of a program in the codes of Jewish law and responsa in keeping with Jewish tradition. In addition to knowledge and mastery of the study of Talmud and halakhah, Conservative semikhah also requires that its rabbinical students receive intensive training in Tanakh, classical biblical commentaries, biblical criticism, Midrash, Kabbalah and Hasidut, the historical development of Judaism from antiquity to modernity, Jewish ethics, the halakhic methodology of Conservative responsa, classical and modern works of Jewish theology and philosophy, synagogue administration, pastoral care, chaplaincy, non-profit management, and navigating the modern world in a Jewish context. Entrance requirements to Conservative rabbinical study centers include a background within Jewish law and liturgy, familiarity with rabbinic literature, Talmud, etc., ritual observance according to Conservative halakha, and the completion of an undergraduate university degree. In accordance with national collegiate accreditation requirements, Conservative rabbinical students earn a Master of Arts in Rabbinic Literature in addition to receiving ordination. See List of rabbinical schools § Conservative
In Reform Judaism rabbinic studies are mandated in pastoral care, the historical development of Judaism, academic biblical criticism, in addition to the study of traditional rabbinic texts. Rabbinical students also are required to gain practical rabbinic experience by working at a congregation as a rabbinic intern during each year of study from year one onwards. All Reform seminaries ordain women and openly LGBT people as rabbis and cantors. See List of rabbinical schools § Reform
There are several possibilities for receiving rabbinic ordination in addition to seminaries maintained by the large Jewish denominations. These include seminaries maintained by smaller denominational movements, and nondenominational (also called "transdenominational" or "postdenominational") Jewish seminaries. See List of rabbinical schools § Other non-Orthodox
Historically and until the present, recognition of a rabbi relates to a community's perception of the rabbi's competence to interpret Jewish law and act as a teacher on central matters within Judaism. More broadly speaking, it is also an issue of being a worthy successor to a sacred legacy.
The divisions between Jewish denominations may have their most pronounced manifestation on whether rabbis from one denomination recognize the legitimacy or authority of rabbis in another.
As a general rule within Orthodoxy and among some in the Conservative movement, rabbis are reluctant to accept the authority of other rabbis whose Halakhic standards are not as strict as their own. In some cases, this leads to an outright rejection of even the legitimacy of other rabbis; in others, the more lenient rabbi may be recognized as a spiritual leader of a particular community but may not be accepted as a credible authority on Jewish law.
These debates cause great problems for recognition of Jewish marriages, conversions, and other life decisions that are touched by Jewish law. Orthodox rabbis do not recognize conversions by non-Orthodox rabbis. Conservative rabbis recognise all conversions done according to Halakha. Finally, the North American Reform and Reconstructionists recognize patrilineality, under certain circumstances, as a valid claim towards Judaism, whereas Conservative and Orthodox maintain the position expressed in the Talmud and Codes that one can be a Jew only through matrilineality (born of a Jewish mother) or through conversion to Judaism.
With few rare exceptions, Jewish women have historically been excluded from serving as rabbis. This changed in the 1970s, when due to the shift in American society under the influence of second-wave feminism, the Hebrew Union College-Jewish Institute of Religion began ordaining women as rabbis. Today, Jewish women serve as rabbis within all progressive branches of Judaism, while in Orthodox Judaism, it is a matter of debate, with most communities not accepting women rabbis, while others either ordain women as rabbis or have allowed alternate clerical roles for women (see: Yoetzet Halacha).
We suggest that the avoidance of the title "Rabbi" for pre-70 sages may have originated with the editors of the Mishnah. The editors attributed the title to some sages and not to others. The avoidance of the title for pre-70 sages may perhaps be seen as a deliberate program on the part of these editors who wanted to create the impression that the "rabbinic movement" began with R. Yochanan b. Zakkai and that the Yavnean "academy" was something new, a notion that is sometimes already implicitly or explicitly suggested by some of the traditions available to them. This notion is not diminished by the occasional claim to continuity with the past which was limited to individual teachers and institutions and served to legitimize rabbinic authority.