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

Steve’s father Warren Dutton began growing grapes in Russian River Valley in the 1960s and Dan worked at Robert Mondavi Winery, Schramsberg, La Crema, and Harford Court—so the duo’s success is no mystery. —Mike Desimone, Robb Report, 2 Jan. 2026

Don’t expect anything too sciencey — Petra Bachmaier and Sean Gallero, the duo known as Luftwerk, fashion simple-seeming artworks out of light, color and form, to create beautiful and surprising perceptual effects. —Lori Waxman, Chicago Tribune, 2 Jan. 2026

In videos obtained by PEOPLE, the duo could be seen hanging out at a party. —Luke Chinman, PEOPLE, 2 Jan. 2026

Multiple videos of the duo went viral on January 1, including one clip that showed Earle affectionately rubbing Brady’s back. —Glamour, 2 Jan. 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