A small piece, part, or quantity of something. She gave me a bit of her sandwich to try.
A unit of information in computing, representing a binary digit, either 0 or 1. The computer processes data in bits and bytes.
A metal mouthpiece used to control a horse. The rider adjusted the bit to ensure the horse was comfortable.
A small tool used for drilling or boring holes. He changed the drill bit to make a larger hole in the wood.