Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
An ancient region of southern Greece occupying the northern part of the Peloponnesus on the Gulf of Corinth. The cities of the region banded together in the early third century B.C. to form the Achaean League, which defeated Sparta but was eventually beaten by the Romans, who annexed Achaea in 146 B.C. and later gave the name to a province that included all of Greece south of Thessaly.