population pop·u·la·tion (pŏp'yə-lā'shən)
The total number of people inhabiting a specific area.
The set of individuals, items, or data from which a statistical sample is taken.
All the organisms that constitute a specific group or occur in a specified habitat.
A group of individuals of the same species occupying a particular geographic area. Populations may be relatively small and closed, as on an island or in a valley, or they may be more diffuse and without a clear boundary between them and a neighboring population of the same species. For species that reproduce sexually, the members of a population interbreed either exclusively with members of their own population or, where populations intergrade, to a greater degree than with members of other populations. See also deme.