Full Definition of HABITAT. 1. a: the place or environment where a plant or animal naturally or normally lives and grows b: the typical place of residence of a person or a group c: a housing for a controlled physical environment in which people can live under surrounding inhospitable conditions (as under the sea).2.: the place or environment where a plant or animal naturally or normally lives and grows b: the typical place of residence of a person or a group c: a housing for a controlled physical environment in which people can live under surrounding inhospitable conditions (as under the sea).