baritone UK /ˈbæɹ.ɪ.təʊn/US /ˈbæɹ.ɪ.toʊn/ noun4 •The male voice between tenor and bass. •The musical range between tenor and bass. •A person, instrument, or group that performs in the range between tenor and bass. •A brass instrument similar to the euphonium, but with a cylindrical bore instead of a conical one; a baritone saxhorn. formsbaritones