or·a·tor /ˈɔrətɚ/
  演說者,演講者,雄辯家,原告,請願人
  Or·a·tor n.
  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.
     I am no orator, as Brutus is.   --Shak.
  Some orator renowned
  In Athens or free Rome.   --Milton.
  2. Law (a) In equity proceedings, one who prays for relief; a petitioner. (b) A plaintiff, or complainant, in a bill in chancery.
  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.
  ◄ ►
  orator
       n : a person who delivers a speech or oration [syn: speechmaker,
            rhetorician, public speaker, speechifier]