the central plateau of Mexico, between the Sierra Madre Occidental and the Sierra Madre Oriental ranges (3700 to 9000 ft.; 1128 to 2743 m): center of former Aztec civilization.
A·ná·huac (ə-nä'wäk') An extensive plateau of central Mexico. A heavily populated and highly industrial area that includes Mexico City, it was the center of a pre-Columbian Aztec civilization.