Entry 2 senses · 2 variants Webster, 1913 Contralto · Con·tral·to · IPA /kɒnˈtɹæltəʊ/ n. a. 01 n. The part sung by the highest male or lowest female voices; the alto or counter tenor. 1. The part sung by the highest male or lowest female voices; the alto or counter tenor.(Mus.) 02 a. Of or pertaining to a contralto, or to the part in music called contralto; as, a contralto voice. 1. Of or pertaining to a contralto, or to the part in music called contralto; as, a contralto voice.(Mus.)