to speak aloud in an oratorical manner; make a formal speech

Brutus declaimed from the steps of the Roman senate building.

to inveigh (usually fol. by against )

He declaimed against the high rents in slums.

to speak or write for oratorical effect, as without sincerity or sound argument.

to utter aloud in an oratorical manner

to declaim a speech.

noun

lecturer , speechifier , speechmaker