Other forms: duets
A duet is a song or piece performed by exactly two people. Sing a duet, a piano duet, perform the duet.
A piano duet is two players at one instrument, where two pianos is a different thing with its own name. The word is Italian for a little two, and it came into English with most of the vocabulary of music.
1nounduetA song or piece performed by two people.
“The two sisters sang a duet at their parents' anniversary party.”
duet is a performance.
Italian duetto is a diminutive of due, two, from Latin duo. Most musical terms came into English from Italian.
Proto-Indo-European
*dwóh₁
Italian
duetto — short musical composition for two voices
English, today
duet
Built from
From Italian duetto (“short musical composition for two voices”), diminutive of due (“two”).
Etymology from Wiktionary, CC BY-SA