The land area capable of supporting a single plant association.

The collective area which one plant association occupies. The habitat type is defined and described on the basis of the vegetation and its associated environment.

The aggregate of all areas that support or can support the same primary vegetation at climax.

A way to classify land area. A habitat type can support certain climax vegetation, both tree and undergrowth species. Habitat typing can indicate the biological potential of a site. ( FS People's Glossary of Eco Mgmt Terms)

(1.) Expression of the biological potential of an area. (2.) Collective term for those physical areas (environments) that support or can support the same plant association, or did support it prior to its destruction or modification by fire, flood, grazing, logging, or epidemics, etc. (3.) A taxonomic unit and a mapping unit.