A tomb (Serer: lomb; Greek: tumbos) is a repository for the remains of the dead. It is generally any structurally enclosed interment space or burial chamber, of varying sizes. Placing a corpse into a tomb can be called immurement, and is a method of final disposition, as an alternative to for example cremation or burial.
The word is used in a broad sense to encompass a number of such types of places of interment or, occasionally, burial, including:
Church monument - within a church (or a tomb-style chest in a churchyard) may be a place of interment, but this is unusual; it may more commonly stand over the grave or burial vault rather than containing the actual body and therefore is not a tomb.
Crypts - often, though not always, for interment; similar to burial vaults but usually for more general public interment
Mausoleum (including ancient pyramid in some countries) - external free-standing structure, above ground, acting as both monument and place of interment, usually for individuals or a family group
Megalithic tomb (including Chamber tomb) - prehistoric place of interment, often for large communities, constructed of large stones and originally covered with an earthen mound
Ohel, a structure built around the grave or graves of HasidicRebbes, prominent rabbis, Jewish community leaders, and biblical figures in Israel and the diaspora
Pillar tomb - a monumental grave. Its central feature is a single, prominent pillar or column, often made of stone.
Rock-cut tomb - a form widespread in the ancient world, in which the tomb is not built but carved out of the rock and can be a free-standing building but is more commonly a cave, which may be extensive and may or may not have an elaborate facade.
Sarcophagus - a stone container for a body or coffin, often decorated and perhaps part of a monument; it may stand within a religious building or greater tomb or mausoleum.
Tumulus - (plural: tumuli) A mound of earth and stones raised over a grave or graves. Tumuli are also known as barrows, burial mounds, Hügelgräber or kurgans', and can be found throughout much of the world. A cairn (a mound of stones built for various purposes), might also be originally a tumulus. A long barrow is a long tumulus, usually for numbers of burials.
As indicated, tombs are generally located in or under religious buildings, such as churches, or in cemeteries or churchyards. However, they may also be found in catacombs, on private land or, in the case of early or pre-historic tombs, in what is today open landscape.