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coin

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A coin is defined as a round piece of money of a certain value.

(noun)

An example of a coin is a dime.

The definition of coin is requiring round pieces of money to use.

(adjective)

An example of coin used as an adjective is in the phrase "a coin washing machine," which means a washing machine that requires payment in coins to use it.

Coin means to make metal money, or to come up with something new.

(verb)

An example of coin is to create quarters.
An example of coin is to create a new word.

See coin in Webster's New World College Dictionary

noun

Archaic quoin
1. a usually round piece of metal with a distinctive stamp, and of a fixed value and weight, issued by a government as money
2. such pieces collectively
Slang money

Origin: ME < OFr coin, coigne, a wedge, stamp, corner < L cuneus, a wedge < IE base *kū-, pointed > OIr cuil, L culex, gnat, Avestan sū-kā, needle

adjective

requiring, or containing machines requiring, one or more coins for operation: a coin laundry

transitive verb

1. to make (coins) by stamping metal
2. to make (metal) into coins
to make up; devise; invent (a new word or phrase)

intransitive verb

to make coins
Brit. to make counterfeit money

Related Forms:

coiner noun

See coin in American Heritage Dictionary 4

noun

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.

transitive verb coined, coin·ing, coins