duo

1 of 2

noun

ˈdü-(ˌ)ō 

also ˈdyü-

plural duos

1

: duet

2

: pair sense 2

duo-

2 of 2

combining form

: two

duologue

Synonyms of duo

Noun

• pair
• couple

Examples of duo in a Sentence

Noun

The comedy duo will perform tonight.

The author-illustrator duo will be signing their books tomorrow.

He and his partner make quite a duo.

Recent Examples on the Web

Noun

The Phillies duo followed up their historic night on Saturday in which Schwarber hit three home runs and Harper hit for the cycle, by both going deep against the Mets again. — CBS News, 22 June 2026

But back the duo steadfastly returned to battle. — Bryan Alexander, USA Today, 22 June 2026

In their place, Spain boss Luis de la Fuente somewhat bafflingly lined up Barcelona duo Ferrán Torres and Gavi as their replacements. — Patrick Sung Cuadrado, CNN Money, 21 June 2026

Blending Degruson’s experience with Belaid’s live-action, indie references, the duo crafted a family-friendly adventure with memorable characters, lush backgrounds and thrilling chase scenes, going from one setting to another in this bigger-than-life odyssey. — Kevin Giraud, Variety, 21 June 2026

Word History

Etymology

Noun

Italian, from Latin, two — more at two

Combining form

Latin duo

First Known Use

Noun

1590, in the meaning defined at sense 1

Kids Definition

duo

noun

ˈd(y)ü-ō 

plural duos

1

: duet

2

: a group of two : pair entry 1