Source : Webster's Revised Unabridged Dictionary (1913)

Eloquent \El"o*quent\, a. [F. ['e]loquent, L. eloquens, -entis,
   p. pr. of eloqui to speak out, declaim; e + loqui to speak.
   See {Loquacious}.]
   1. Having the power of expressing strong emotions or forcible
      arguments in an elevated, impassioned, and effective
      manner; as, an eloquent orator or preacher.

            O Death, all-eloquent! You only prove What dust we
            dote on when 't is man we love.       --Pope.

   2. Adapted to express strong emotion or to state facts
      arguments with fluency and power; as, an eloquent address
      or statement; an eloquent appeal to a jury.

Source : WordNet®

eloquent
     adj : expressing yourself readily, clearly, effectively; "able to
           dazzle with his facile tongue"; "silver speech" [syn: {facile},
            {fluent}, {silver}, {silver-tongued}, {smooth-spoken}]