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English definition of “unison”

unison

noun (ACTING TOGETHER)    /ˈjuː.nɪ.sən/
in unison acting or speaking together, or at the same time: "We want ice cream!" the children chanted in unison.Acting, being or existing together
(Definition of unison noun (ACTING TOGETHER) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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