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 area on the northern bank of the Rio Grande near El Paso, Texas. It became part of the United States after the river shifted course in the 19th century and was returned to Mexico in 1963.