Definitions of laughter

1. the activity of laughing; the manifestation of joy or mirth of scorn; " he enjoyed the laughter of the crowd"

2. Convulsive sounds and movements caused by merriment.

3. Act or noise of laughing.

4. Act of laughing.

5. The action of laughing.

6. An involuntary movement of the muscles of the face, and a peculiar expression of the eyes, accompanied with convulsive sounds more or less loud, indicating mirth or great satisfaction.