Coin \Coin\, v. t. [imp. & p. p. Coined (koind); p. pr. & vb. n. Coining.]

1. To make of a definite fineness, and convert into coins, as a mass of metal; to mint; to manufacture; as, to coin silver dollars; to coin a medal.

2. To make or fabricate; to invent; to originate; as, to coin a word.

Some tale, some new pretense, he daily coined, To soothe his sister and delude her mind. --Dryden.

3. To acquire rapidly, as money; to make.

Tenants cannot coin rent just at quarter day. --Locke.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Coin \Coin\ (koin), n. [F. coin, formerly also coing, wedge, stamp, corner, fr. L. cuneus wedge; prob. akin to E. cone, hone. See Hone, n., and cf. Coigne, Quoin, Cuneiform.]

1. A quoin; a corner or external angle; a wedge. See Coigne, and Quoin.

2. A piece of metal on which certain characters are stamped by government authority, making it legally current as money; -- much used in a collective sense.

It is alleged that it [a subsidy] exceeded all the current coin of the realm. --Hallam.

3. That which serves for payment or recompense.

The loss of present advantage to flesh and blood is repaid in a nobler coin. --Hammond.

Coin balance. See Illust. of Balance.

To pay one in his own coin, to return to one the same kind of injury or ill treatment as has been received from him. [Colloq.]

Source: Webster's Revised Unabridged Dictionary (1913)
 

Coin \Coin\, v. i. To manufacture counterfeit money.

They cannot touch me for coining. --Shak.

Source: Webster's Revised Unabridged Dictionary (1913)