button

noun
but·ton
/ˈbʌtən/

A knob or disc that is passed through a loop or (buttonhole), serving as a fastener.

Other meanings

A mechanical device designed to be pressed with a finger in order to open or close an electric circuit or to activate a mechanism.
“Pat pushed the button marked "shred" on the blender.”
An on-screen control that can be selected as an activator of an attached function.
“Click the button that looks like a house to return to your browser's home page.”

A kind of

fastener

Kinds of button

coat button
shirt button

Example sentences

“Remember to smash that like button!”
Tatoeba · hecko · CC0
“What does that button do?”
Tatoeba · shekitten · CC0

Word history

From Old French "bouter".

Where this comes from

This definition is adapted from “button” on Wiktionary, by its contributors; example sentences are from Tatoeba, credited to their authors above; related-word lists use Open English WordNet (CC BY 4.0, based on Princeton WordNet), published under CC BY-SA 4.0. This page is published under the same licence.