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1. In Aztec legend, the original home of the Aztec people, held to have been located in northwest Mexico.
2. The American Southwest, specifically the territory of northern Mexico ceded to the United States by the Treaty of Guadalupe Hidalgo in 1848. The term is used especially by Chicano-rights activists.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.