A quoin; a corner or external angle; a wedge. See Coigne, and Quoin.
- A small piece of metal, usually flat and circular, authorized by a government for use as money.
- Metal money considered as a whole.
- A flat circular piece or object felt to resemble metal money: a pizza topped with coins of pepperoni.
- Architecture A corner or cornerstone.
- A mode of expression considered standard: Two-word verbs are valid linguistic coin in the 20th century.
- To make (pieces of money) from metal; mint or strike: coined silver dollars.
- To make pieces of money from (metal): coin gold.
- To devise (a new word or phrase).
- Requiring one or more pieces of metal money for operation: a coin washing machine.
- the other side of the coin One of two differing or opposing views or sides.