Mesquite (məskētˈ) [key], city (1990 pop. 101,484), Dallas co., N Tex., a suburb of Dallas; inc. 1887. Manufacturing includes industrial power supplies, building materials, and medical equipment. The city's population increased by more than 50% between 1980 and 1990, and it continues to be one of the fastest-growing U.S. cities. An annual rodeo is held there every October.