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.
A mountain pass of southeast Mexico between Veracruz and Mexico City. It was the site of a U.S. victory (April 18, 1847) in the Mexican War.