unison(redirected from Unisonant)
Also found in: Dictionary, Thesaurus, Medical, Legal, Financial.
unison,in music, tones identical in pitch produced by two or more parts or voices. In popular usage a vocal composition is said to be sung in unison even though some of the voices are separated from others by the interval of an octave.
a. the interval between two sounds of identical pitch
b. played or sung at the same pitch