A species that can live in many different habitats and can feed on a number of different organisms. For example, shore crabs on the Pacific coast live in a wide of variety of habitats, such as mud, sand and rock, and feed on everything from the algae growing on rocks to invertebrates to detritus.

A species that tolerates a broad range of environmental conditions; a generalist has a broad ecological niche.

an essence with a broad-reaching effect and a wide range of action

a person who knows less and less about more and more until pretty soon he knows nothing about everything