unison
noun
[ ˈjuːnɪs(ə)n ]
• simultaneous performance or utterance of action or speech.
• "‘Yes, sir,’ said the girls in unison"
Similar:
simultaneously,
at (one and) the same time,
(all) at once,
at the same moment,
(all) together,
as one,
in concert,
in chorus,
• coincidence in pitch of sounds or notes.
• "the flutes play in unison with the violas"
unison
adjective
• performed in unison.
• "unison congregational singing"
Origin:
late Middle English (in unison (sense 2 of the noun)): from Old French, or from late Latin unisonus, from Latin uni- ‘one’ + sonus ‘sound’.
