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noun uni·son \ˈyü-nə-sən, -nə-zən\

Definition of UNISON

a :  identity in musical pitch; specifically :  the interval of a perfect prime
b :  the state of being so tuned or sounded
c :  the writing, playing, or singing of parts in a musical passage at the same pitch or in octaves
:  a harmonious agreement or union :  concord
unison adjective
in unison
:  in perfect agreement :  so as to harmonize exactly <a class reciting in unison>
:  at the same time :  simultaneously

Examples of UNISON

  1. <the members of the committee are in unison on this point>

Origin of UNISON

Middle English unisoun, from Middle French unisson, from Medieval Latin unisonus having the same sound, from Latin uni- + sonus sound — more at sound
First Known Use: 15th century

Other Music Terms

cacophony, chorister, concerto, counterpoint, madrigal, obbligato, presto, presto, refrain, riff, segue
UNISON Defined for Kids


noun uni·son \ˈyü-nə-sən\

Definition of UNISON for Kids

:  the state of being tuned or sounded at the same pitch or at an octave
in unison
:  in exact agreement <They are in unison as to what to do next.>
:  at the same time <… they all stuck their tongues out in unison … — Louise Fitzhugh, Harriet the Spy>


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