When referring to humans, a community is defined as:
A collection of human beings who have something in common.
A local community is a fairly small group of people who share a common place
of residence and a set of institutions based on this fact, but the word
‘community’ is also used to refer to larger collections of people who have
something else in common (e.g., national community, donor community).
When referring to other living organisms, a community is
An assemblage of species occurring in the same space or time, often linked by
biotic interactions such as competition or predation.
Millennium Ecosystem Assessment