What does "unison" mean?
in unison
- sounding the same note at the same time
- sounding together in octaves
- with all the voices or instruments performing the same part: said of a musical composition or passage
- uttering the same words, or producing the same sound, at the same time
See unison in American Heritage Dictionary 4 Idioms
in unison
- In complete agreement; harmonizing exactly.
- At the same time; at once.
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