Source : Webster's Revised Unabridged Dictionary (1913)

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.

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.]

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

         They cannot touch me for coining.        --Shak.

Source : WordNet®

coin
     v 1: of phrases or words
     2: form by stamping, punching, or printing; "strike coins";
        "strike a medal" [syn: {mint}, {strike}]

coin
     n : a metal piece (usually a disc) used as money