The Collaborative International Dictionary of English v.0.48:

Currency \Cur"ren*cy\ (k?r"r?n-c?), n.; pl. Currencies (-s?z).
   [Cf. LL. currentia a current, fr. L. currens, p. pr. of
   currere to run. See Current.]
   1. A continued or uninterrupted course or flow like that of a
      stream; as, the currency of time. [Obs.] --Ayliffe.
      [1913 Webster]

   2. The state or quality of being current; general acceptance
      or reception; a passing from person to person, or from
      hand to hand; circulation; as, a report has had a long or
      general currency; the currency of bank notes.
      [1913 Webster]

   3. That which is in circulation, or is given and taken as
      having or representing value; as, the currency of a
      country; a specie currency; esp., government or bank notes
      circulating as a substitute for metallic money.
      [1913 Webster]

   4. Fluency; readiness of utterance. [Obs.]
      [1913 Webster]

   5. Current value; general estimation; the rate at which
      anything is generally valued.
      [1913 Webster]

            He . . . takes greatness of kingdoms according to
            their bulk and currency, and not after intrinsic
            value.                                --Bacon.
      [1913 Webster]

            The bare name of Englishman . . . too often gave a
            transient currency to the worthless and ungrateful.
                                                  --W. Irving.
      [1913 Webster]