A fastener used on clothing; fastens with a snapping sound WordNet 3.0 & Open English WordNet

A snap fastener, also called snap button, press stud, press fastener, dome fastener, popper, snap and tich, is a pair of interlocking discs, made out of a metal or plastic, commonly used in place of traditional buttons to fasten clothing and for similar purposes. Wikipedia

A clothing fastener Wikipedia Disambiguation

two-part fastener consisting of a ball and socket that snap into place when pressed together Wikidata

Snap fastener. Wiktionary

A fastening device that makes a snapping sound when used. Wiktionary

Fastening device. Wiktionary (translation)

A pair of male/female interlocking disks used to fasten a piece of clothing in place of buttons. Wiktionary

Fastening mechanism. Wiktionary (translation)