If something snaps or if you snap it, it breaks suddenly, usually with a sharp cracking noise.

If you snap something into a particular position, or if it snaps into that position, it moves quickly into that position, with a sharp sound.

If you snap your fingers, you make a sharp sound by moving your middle finger quickly across your thumb, for example in order to accompany music or to order someone to do something.

If someone snaps at you, they speak to you in a sharp, unfriendly way.

If someone snaps, or if something snaps inside them, they suddenly stop being calm and become very angry because the situation has become too tense or too difficult for them.

If an animal such as a dog snaps at you, it opens and shuts its jaws quickly near you, as if it were going to bite you.

A snap decision or action is one that is taken suddenly, often without careful thought.

A snap is a photograph.

If you snap someone or something, you take a photograph of them.

Snap is a simple British card game in which the players take turns to put cards down on a pile, and try to be the first to shout 'snap' when two cards with the same number or picture are put down.

You can say 'Snap!' as an expression of surprise when you realize that two things are the same or very similar, for example if you meet a friend wearing the same shirt as you.

A snap is the same as a snap fastener .