coin : Idioms & Phrases

noun a container (usually with a slot in the top) for keeping money at home
money box; bank; savings bank.
- the coin bank was empty

noun the collection and study of money (and coins in particular)
numismatology; numismatics; coin collecting.

noun a collection of coins
noun the collection and study of money (and coins in particular)
numismatology; numismatics; coin collecting.

noun a collector and student of money (and coins in particular)
numismatologist; numismatist.

noun a machine that is operated by the insertion of a coin in a slot
slot machine.

adjective of devices that do not operate without the prior insertion of one or more coins
- a coin-operated telephone

a coin which has been specially struck, to produce the finest specimen of its type. Usually such coins are double-struck from polished dies, and the raised features are sometimes frosted. They thus have sharper features and more mirror-like fields than production coins (i.e. those coins struck for circulation); they are considered by coin collectors as the most desirable specimens of each coin, and usually sell at a premium to their corresponding production coins.

to return to one the same kind of injury or ill treatment as has been received from him. Colloq.

to remove a portion of a piece of coin, as by shaking it with others in a bag, so that the friction wears off a small quantity of the metal.