Mexican wave noun 1verb 1forms 3 noun1 •(UK, Commonwealth) A phenomenon that primarily occurs at sports events, where the members of the crowd stand up and/or raise their hands in turn, creating the illusion of a wave passing through the crowd.A Mexican wave travels around a stadium very much more rapidly than a person could. — 2007 verb1 •To perform a Mexican wave. formsMexican waved · Mexican waving · Mexican waves