: the place or environment where a plant or animal naturally occurs <the human pubic region is the natural habitat of the crab louse>
: a housing for a controlled physical environment in which people can live surrounded by inhospitable conditions (as under the sea)
Place where an organism or a community of organisms lives, including all living and nonliving factors or conditions of the surrounding environment. A host organism inhabited by parasites is as much a habitat as a place on land such as a grove of trees or an aquatic locality such as a small pond. Microhabitat refers to the conditions and organisms in the immediate vicinity of a plant or animal.