U″ni‐son (?; 277), a. [Cf. It. unisono. See Unison, n.] 1. Sounding alone.
intermixed with voice,
Choral or unison. Milton.
2. (Mus.) Sounded alike in pitch; unisonant; unisonous; as, unison passages, in which two or more parts unite in coincident sound.