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

Nina Raine and Moses Raine, previously best known as playwrights, penned the scripts, making their debut as a TV writing duo. — Jesse Whittock, Deadline, 8 Oct. 2026

Life’s one-handedness puzzle The duo’s research has both given chemists fundamental new tools that are widely used in their daily work and awakened interest in the chemistry of life’s origins, the committee said. — Katie Hunt, CNN Money, 7 Oct. 2026

However, the judges didn’t lend the same approval in their reaction to the duo’s performance. — Michael Saponara, Billboard, 7 Oct. 2026

On Friday night, country music duo Dan + Shay will be playing a show at PPG Paints Arena. — Mike Darnay, CBS News, 7 Oct. 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