IPA: /juˈnɪsən/
KK: /juˈnɪsən/
A situation where people or things are in agreement or do something together at the same time.
The choir sang in unison, creating a beautiful harmony.
Unison → It is formed from "uni-" (meaning one) and "sonus" (meaning sound). The word "unison" refers to the occurrence of two or more sounds being produced at the same pitch or in harmony, effectively creating one sound.
Think of 'one' ('uni-') sound ('sonus') coming together — that's what unison means.