A public speaker; one who delivers an oration; especially, one distinguished for his skill and power as a public speaker; one who is eloquent.
In equity proceedings, one who prays for relief; a petitioner.
A plaintiff, or complainant, in a bill in chancery.
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.
It really is true that an orator is simply a good man who speaks well. George McGovern
Christopher Hitchens was a great warrior, a magnificent orator, a pugilist and a gentleman. He was kind, but he took no prisoners when arguing with idiots. Richard Dawkins
The cello is a hero because of its register - its tenor voice. It is a masculine instrument, whereas the violin is feminine because of its soprano pitch. When the cello enters in the Dvorak Concerto, it is like a great orator. Mstislav Rostropovich