speaker

1 a person in charge of a meeting the speaker announced that it was time for the club to move on to another matter Synonyms chairman, chairperson, moderator, president, presider, prolocutor, chairRelated Words chairwoman; cochair, cochairman, cochairperson, cochairwoman, copresident

2 a person who speaks for another or for a group unofficially chose a speaker to broach the subject with the supervisor of the department Synonyms mouth, mouthpiece, point man, point person, prophet, spokesperson, spokesmanRelated Words spokesmodel, spokeswoman; front, promoter, shill; communicator, sayer, talker; agent, ambassador, delegate, emissary, envoy, representative

3 a person who makes usually formal public speeches the after-dinner speaker was a career diplomat who regaled us with humorous anecdotes from his travels abroad Synonyms lecturer, oratorRelated Words rhetorician, spellbinder; declaimer, spouter; spieler