bit

1. bit (noun) — sense 1

Definition: A small amount of something.

Example: There were bits of paper all over the floor.

2. bit (noun) — sense 2

Definition: A piece of metal placed in a horse's mouth and connected to the reins to direct the animal.

Example: A horse hates having a bit put in its mouth.

3. bit (noun) — sense 3

Definition: A rotary cutting tool, fitted to a drill, brace, or router, used to bore or drill holes or to remove material from the profile of the workpiece.

Example: router bit

4. bit (verb) — sense 4

Definition: To put a bridle upon; to put the bit in the mouth of (a horse).