A mountainous peninsula of western Mexico extending south-southeast between the Pacific Ocean and the Gulf of California south of the U.S. border. It was first explored by the Spanish in the 1530s.
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2007. Published by Houghton Mifflin Company. All rights reserved.
