A Check

1. (chess) A situation in which the king is directly threatened by an opposing piece.
2. An inspection or examination.
3. A control; a limit or stop.
4. (US) A mark (especially a checkmark: ✓) used as an indicator.

Synonyms: tick (UK), checkmark

5. (US) An order to a bank to pay money to a named person or entity.

Synonym: cheque (UK, Canada)

6. (US) A bill, particularly in a restaurant.

Synonyms: bill, cheque (Canada)

7. (contact sports) A maneuver performed by a player to take another player out of the play
8. A token used instead of cash in gaming machines, or in gambling generally.
9. A lengthwise separation through the growth rings in wood.
10. A mark, certificate, or token by which errors may be prevented, or a thing or person may be identified.
11. (falconry) The forsaking by a hawk of its proper game to follow other birds.
12. A small chink or crack.