- coincidence in pitch of two or more musical tones, voices, etc.
- the musical interval of a perfect prime.
- the performance of musical parts at the same pitch or at the octave.
- a sounding together in octaves, especially of male and female voices or of higher and lower instruments of the same class.
- a process in which all elements behave in the same way at the same time; simultaneous or synchronous parallel action: to march in unison.
- in perfect accord; corresponding exactly: My feelings on the subject are in unison with yours.
- music
- the interval between two sounds of identical pitch
- played or sung at the same pitch
- complete agreement; harmony (esp in the phrase in unison)
- (in Britain) a trade union representing local government, health care, and other workers: formed in 1993 by the amalgamation of COHSE, NALGO, and NUPE
