define aztec
(Äz`tÄk'), Indian people dominating central Mexico at the time of the Spanish conquest. Their language belonged to the Nahuatlan subfamily of Uto-Aztecan languages. They arrived in the Valley of Mexico from the north toward the end of the 12th cent. and until the founding of their capital, TenochtitlÃ¡nTenochtitlÃ¡n. , ancient city in the central valley of Mexico. The capital of the Aztec, it was founded (c.A.D. 1345) on a marshy island in Lake Texcoco. It was a flourishing city (with an estimated population of between 200,000 and 300,000), connected with the mainland by. .....