Definition of "sympatric" []

• Ecology Occupying the same or overlapping geographic areas without interbreeding. Used of populations of closely related species. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "The first supposes that all speciation is sympatric, which is plain nonsense."
• "Interestingly, the 2 chameleon species are sympatric, that is, they can be found together in the same habitat."
• "This type of diversification-without-isolation is now called sympatric speciation, and demonstrating its existence has been one of the toughest recent nuts in evolutionary biology."