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

Seals and Crofts were native Texans who had known each other since high school and played together in various groups before becoming a duo, Seals & Crofts, in the late 1960s. —Hillel Italie, Chicago Tribune, 27 Mar. 2026

Yet, unlike the middle-of-the-road duo, Fetterman does not wield his would-be leverage to score policy wins. —Ramsey Touchberry, The Washington Examiner, 26 Mar. 2026

Back on the Road Fans looking to see the duo live have plenty of opportunities. —Hanna Wickes, Miami Herald, 26 Mar. 2026

Rodarte and a Yuba County Sheriff’s Office sergeant last fall were cleared of wrongdoing by Yuba County District Attorney Clint Curry, who found that the duo, part of a larger tactical team at one of several sweeps during the multi-county operation, acted in self-defense. —Jake Goodrick, Sacbee.com, 26 Mar. 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