The Collaborative International Dictionary of English v.0.48:

Eloquence \El"o*quence\, n. [F. ['e]loquence, L. eloquentia, fr.
   eloquens. See Eloquent.]
   1. Fluent, forcible, elegant, and persuasive speech in
      public; the power of expressing strong emotions in
      striking and appropriate language either spoken or
      written, thereby producing conviction or persuasion.
      [1913 Webster]

            Eloquence is speaking out . . . out of the abundance
            of the heart.                         --Hare.
      [1913 Webster]

   2. Fig.: Whatever produces the effect of moving and
      persuasive speech.
      [1913 Webster]

            Silence that spoke and eloquence of eyes. --Pope.
      [1913 Webster]

            The hearts of men are their books; events are their
            tutors; great actions are their eloquence.
                                                  --Macaulay.
      [1913 Webster]

   3. That which is eloquently uttered or written.
      [1913 Webster]

            O, let my books be then the eloquence
            And dumb presagers of my speaking breast. --Shak.

   Syn: Oratory; rhetoric.
        [1913 Webster]

The Devil's Dictionary (1881-1906):

ELOQUENCE, n.  The art of orally persuading fools that white is the
color that it appears to be.  It includes the gift of making any color
appear white.


Moby Thesaurus II by Grady Ward, 1.0:

34 Moby Thesaurus words for "eloquence":
   articulacy, articulateness, debating, declamation, demagogism,
   elocution, expression, expressiveness, facility of speech,
   facundity, fervor, force, forcefulness, forensics, homiletics,
   lecturing, meaningfulness, oratory, passion, platform oratory,
   power, public speaking, pyrotechnics, rabble-rousing, rhetoric,
   speaking, speechcraft, speechification, speeching, speechmaking,
   spirit, stump speaking, vigor, wordcraft