1. An individual who has the ability to perceive quickly and to express ideas cleverly: Wits usually have the talent of presenting something that is amusing or which causes laughter.

Mark Twain was a famous wit because he had the natural ability to create humor with a sharp tongue and quick responses.

2. A person who has mental sharpness and inventiveness: Polly was a wit with keen intelligence when she used words and ideas in quick and inventive ways.