From Longman Dictionary of Contemporary Englishduetdu‧et1 /djuˈet $ duˈet/ noun [countable] APMa piece of music for two singers or players → quartet, solo, trio
Examples from the Corpus
duet• For 1996, the solo and duet were tossed out of the Olympics and replaced by the eight-woman team.• He now formed two child duets.• Wheeler and Jones sang a mawkish duet about a girl worth a million wishes.duetduet2 verb (past tense duetted, past participle duetting) if one singer or musician duets with another, they sing or play together→ See Verb tableOrigin duet (1700-1800) Italian duetto, from duo “group of two” 