bit

noun

1. A small amount of something.
2. A piece of metal placed in a horse's mouth and connected to the reins to direct the animal.
3. 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.
4. A coin of a specified value.
5. A unit of currency worth one eighth of a dollar, originally of a Spanish dollar but later also US or Canadian; also, a coin with this value, in particular the silver Spanish real.
6. A coin of a value similar but not equal to this, in particular the ‘short bit’, i.e. the ten-cent piece or dime.
7. A unit of currency and coin of the British West Indies worth six black dogs, originally equal to one-eighth of a Spanish dollar but later increasingly debased to one tenth, one eleventh, one twelfth, etc.
8. A unit of currency of the Dutch West Indies in the early 20th century, worth one fifth of a cent.
9. Synonym of microbitcoin.
10. Specifically, a small amount of time.
11. A small fraction above a whole number.
12. Fractions of a second.
13. A portion of something.
14. Somewhat; something, but not very great; also used like jot and whit to express the smallest degree. See also a bit.
15. A replaceable tip for a hand tool or power tool, comprising the portion that drives a fastener.
16. A prison sentence, especially a short one.
17. An excerpt of material making up part of a show, comedy routine, etc.
18. A gag or put-on; a humorous conceit, especially when insistently presented as true.
19. The part of a key which enters the lock and acts upon the bolt and tumblers.
20. The cutting iron of a plane.