Definition of duets:
(n) :
(music) A song composed for and/or performed by a duo.
(n) :
(music) A musical composition in two parts, each performed by a single voice (singer, instrument or univoce ensemble).
(n) :
A pair or couple, especially one that is harmonious or elegant.
(v) :
(intransitive) To perform a duet.
(v) :
(transitive) To perform (sing, play, etc.) as a duet.
(v) :
(intransitive, zoology, of pairs of animals) To communicate (warnings, mating calls, etc.) through song.