coupler

noun

cou·​pler ˈkə-p(ə-)lər 

1

: one that couples

2

: a contrivance on a keyboard instrument by which keyboards or keys are connected to play together

Examples of coupler in a Sentence

Recent Examples on the Web

The trailer relies on a hitch coupler force sensor to provide continuous feedback on the pull on the tow vehicle, managing the trailer's movement by increasing motor output or applying the electro-mechanical brakes located at all four wheels. — New Atlas, 23 July 2026

Different couplers for different applications Rather than developing a single universal solution, the MIT researchers created multiple optical coupling approaches optimized for different requirements. — Kaif Shaikh, Interesting Engineering, 6 July 2026

The two trains were moved to a yard for further inspection, where damage was found to the couplers of both trains. — Evan Simko-Bednarski, New York Daily News, 15 Apr. 2026

One resourceful backpacker invented this coupler for refilling miniature toothpaste tubes from full-sized ones. — Zoe Gates, Outside, 28 Oct. 2025

Word History

First Known Use

1552, in the meaning defined at sense 1