unison
UK: ˈjuːnɪs(ə)n | US: ˈjuːnɪsən
n. 1. The state of being in complete agreement or harmony.
n. 2. (Music) Simultaneous performance of the same melody or note by multiple voices or instruments.
The word "unison" originates from Latin unisonus, combining uni- (meaning "one") and sonus (meaning "sound"). It entered Middle English via Old French. The term originally described musical harmony where voices or instruments produced the same pitch, later extending metaphorically to denote general agreement or unity. The morphemes reflect a clear logical progression: "one sound" → "harmonized sound" → "harmony in general."
The choir sang in perfect unison, creating a powerful effect.
The team worked in unison to complete the project ahead of schedule.
Their opinions were in unison on the matter.
The violins played the opening note in unison.
The crowd cheered in unison as the winner was announced.