Definitions
1.nounA musical composition in two parts, each performed by a single voice (singer, instrument or univoce ensemble).
2.nounA song composed for and/or performed by a duo.
3.nounA pair or couple, especially one that is harmonious or elegant.
4.verbTo perform a duet.
5.verb(of pairs of animals) To communicate (warnings, mating calls, etc.) through song.
6.verbTo perform (sing, play, etc.) as a duet.
7.verb(of two people) To say at the same time, to chorus.