1. To strike the palms of the hands together with a sudden explosive sound, as in applauding.

2. To come together suddenly with a sharp sound.

1. To strike together with a sharp sound, as one hard surface on another: clapped a book on the desk.

2. To strike (the hands) together with an abrupt, loud sound, usually repeatedly: clapped hands in time to the music.

3. To strike lightly but firmly with the open hand, as in greeting: clapped me on the shoulder.

4. To put or place quickly and firmly: clapped the purse snatcher in jail; clapped a lid on the box.

5. To arrange hastily: clapped together a plan.

1. The act or sound of clapping the hands.

2. A sudden, loud, explosive sound: a clap of thunder.

3. A sharp blow with the open hand; a slap.

4. Obsolete A sudden stroke of fortune, especially of bad luck.