When you and someone else both say the exact same thing at the exact same time, this is an example of a situation where you are talking in unison.
Crew members rowing in unison; pigeons wheeling in unison.
Their expectations were in unison.
The unison has a pitch ratio of 1:1.
The children greeted their teacher in unison.
- sounding the same note at the same time
- sounding together in octaves
- with all the voices or instruments performing the same part
- uttering the same words, or producing the same sound, at the same time
Idioms and Phrasal Verbs
Origin of unison
- Middle English from Old French from Medieval Latin ūnisonus in unison from Late Latin monotonous Latin ūni- uni- Latin sonus sound swen- in Indo-European roots
From American Heritage Dictionary of the English Language, 5th Edition
- From Middle English unisoun, from Middle French unisson, from Medieval Latin unisonus (“having the same sound"), from Latin uni- + sonus (“sound").