a piece of metal stamped and issued by the authority of a government for use as money.
a number of such pieces.
Informal. money; cash: He's got plenty of coin in the bank.
Architecture, quoin ( defs 1, 2 ).
Archaic. a corner cupboard of the 18th century.
operated by, or containing machines operated by, inserting a coin or coins into a slot: a coin laundry.
verb (used with object)
to make (coinage) by stamping metal: The mint is coining pennies.
to convert (metal) into coinage: The mint used to coin gold into dollars.
to make; invent; fabricate: to coin an expression.
Metalworking. to shape the surface of (metal) by squeezing between two dies. Compare emboss ( def 3 ).
verb (used without object)
British Informal. to counterfeit, especially to make counterfeit money.
coin money, Informal. to make or gain money rapidly: Those who own stock in that restaurant chain are coining money.
pay someone back in his / her own coin, to reciprocate or behave toward in a like way, especially inamicably; retaliate: If they persist in teasing you, pay them back in their own coin.
the other side of the coin, the other side, aspect, or point of view; alternative consideration.

1300–50; Middle English coyn(e), coygne < Anglo-French; Middle French coin, cuigne wedge, corner, die < Latin cuneus wedge

coinable, adjective
coiner, noun
miscoin, verb
recoin, verb (used with object)
uncoined, adjective
well-coined, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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World English Dictionary
coin (kɔɪn)
1.  a metal disc or piece used as money
2.  metal currency, as opposed to securities, paper currency, etcRelated: nummary
3.  architect a variant spelling of quoin
4.  pay a person back in his own coin to treat a person in the way that he has treated others
5.  the other side of the coin the opposite view of a matter
6.  (tr) to make or stamp (coins)
7.  (tr) to make into a coin
8.  (tr) to fabricate or invent (words, etc)
9.  informal (tr) to make (money) rapidly (esp in the phrase coin it in)
10.  to coin a phrase said ironically after one uses a cliché
Related: nummary
[C14: from Old French: stamping die, from Latin cuneus wedge]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

1304, from O.Fr. coigne "a wedge, cornerstone," from L. cuneus "a wedge." Die for stamping metal was wedge-shaped, and the word came to mean "thing stamped, a piece of money" by late 14c. To coin a phrase is c.1590. The "cornerstone" sense is now usually quoin.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Abbreviations & Acronyms
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Bible Dictionary

Coin definition

Before the Exile the Jews had no regularly stamped money. They made use of uncoined shekels or talents of silver, which they weighed out (Gen. 23:16; Ex. 38:24; 2 Sam. 18:12). Probably the silver ingots used in the time of Abraham may have been of a fixed weight, which was in some way indicated on them. The "pieces of silver" paid by Abimelech to Abraham (Gen. 20:16), and those also for which Joseph was sold (37:28), were proably in the form of rings. The shekel was the common standard of weight and value among the Hebrews down to the time of the Captivity. Only once is a shekel of gold mentioned (1 Chr. 21:25). The "six thousand of gold" mentioned in the transaction between Naaman and Gehazi (2 Kings 5:5) were probably so many shekels of gold. The "piece of money" mentioned in Job 42:11; Gen. 33:19 (marg., "lambs") was the Hebrew _kesitah_, probably an uncoined piece of silver of a certain weight in the form of a sheep or lamb, or perhaps having on it such an impression. The same Hebrew word is used in Josh. 24:32, which is rendered by Wickliffe "an hundred yonge scheep."

Easton's 1897 Bible Dictionary
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