Uto-Aztecan UK /ˌjuː.təʊ.æzˈtɛ.kən/US /ˌju.toʊ.æzˈtɛ.kən/adjective 1noun 1forms 1 adjective1 •Of or pertaining to these languages. noun1 •A speaker of one of these languages. formsUto-Aztecans