[1] : The Collaborative International Dictionary of English v.0.48

orator \or"ator\, n. l., fr. orare to speak, utter. see
   oration.
   1. a public speaker; one who delivers an oration; especially,
      one distinguished for his skill and power as a public
      speaker; one who is eloquent.
      1913 webster

            i am no orator, as brutus is.         --shak.
      1913 webster

            some orator renowned
            in athens or free rome.               --milton.
      1913 webster

   2. law
      a in equity proceedings, one who prays for relief; a
          petitioner.
      b a plaintiff, or complainant, in a bill in chancery.
          --burrill.
          1913 webster

   3. eng. universities an officer who is the voice of the
      university upon all public occasions, who writes, reads,
      and records all letters of a public nature, presents, with
      an appropriate address, those persons on whom honorary
      degrees are to be conferred, and performs other like
      duties; -- called also public orator.
      1913 webster
see also:
oration public orator 

[2] : WordNet (r) 2.0

orator
     n : a person who delivers a speech or oration syn: speechmaker,
          rhetorician, public speaker, speechifier
see also:
speechmaker rhetorician public speaker speechifier 

[3] : Bouvier's Law Dictionary, Revised 6th Ed (1856)

orator, practice. a good man, skillful in speaking well, and who employs a 
perfect eloquence to defend causes either public or private. dupin, 
profession d'avocat, tom. 1, p. 19.. 
     2. in chancery, the party who files a bill calls himself in those 
pleadings your orator. among the romans, advocates were called orators. 
code, 1, 8, 33, 1. 

Orator >> O Words
Orator, definition of term: Orator
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