The Collaborative International Dictionary
Orator \Or"a*tor\, n. [L., fr. orare to speak, utter. See Oration.]
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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. -
(Law)
In equity proceedings, one who prays for relief; a petitioner.
A plaintiff, or complainant, in a bill in chancery.
--Burrill.
(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.
Wikipedia
The Public Orator is a traditional official post at universities, especially in the United Kingdom. The person in this position acts as the voice of the university during public occasions.
The position at Oxford University dates from 1564. The Public Orator at the University presents honorary degrees, giving an oration for each person that is honoured. They may be required to compose addresses and letters as directed by the Hebdomadal Council of the University. Speeches when members of the royal family are present may also be required. The post was instituted for a visit to Oxford by Queen Elizabeth I in 1566. The Public Orator, Thomas Kingsmill, gave a very long historical speech. Sir Isaac Wake addressed King James I similarly in 1605.
At the University of Cambridge, the title for the position changed from "Public Orator" to "Orator" in 1926. Trinity College Dublin in Ireland also has a Public Orator. There is no equivalent position in American universities.