Meaning of “snap” - Learner’s Dictionary

snap

noun uk us /snæp/
SOUND [ no plural ]

a sudden, short, loud sound like something breaking or closing:

I heard a snap as I sat on the pencil.
PHOTOGRAPH [ C ] UK informal (also UK/US snapshot)

a photograph:

holiday snaps
FASTENING [ C ] US (UK popper)

a metal or plastic object made of two parts which fit together with a short, loud sound, used to fasten clothing

GAME [ U ]

a card game in which you say "snap" when you see two cards that are the same

be a snap US informal

to be very easy:

The French test was a snap.

(Definition of “snap noun” from the Cambridge Learner’s Dictionary © Cambridge University Press)