a specific type of complex ecological community characterized by specific environmental conditions and a distinctive group of plants and animals, maintained in a relatively stable equilibrium, such as a rain forest biome or prairie biome.

a particular region which is a biome{1}.

A set of plant communities that have similar life-forms, generally expressed at a continental scale (e.g., the coniferous biome).

One of the major categories of the world's distinctive plant assemblages, e.g. the tundra biome, the tropical rainforest biome.