unison has definitions from the field of music
1
[ noun ] occurring together or simultaneously

Examples

: "the two spoke in unison"

Related terms

concurrence

2
[ noun ] corresponding exactly

Examples

: "marching in unison"

Related terms

agreement

3
[ noun ] (music) two or more sounds or tones at the same pitch or in octaves

Examples

: "singing in unison"

Related terms

sound music

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