1. One of the townships of ancient Attica.
2. Ecology. A local, usually stable population of interbreeding organisms of the same kind or species.

[Greek dēmos, people, land.]

The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.