one who speaks.-one who utters or pronounces a discourse; usually, one who utters a speech in public; as, the man is a good speaker, or a bad speaker.-one who is the mouthpiece of others; especially, one who presides over, or speaks for, a delibrative assembly, preserving order and regulating the debates; as, the speaker of the house of commons, originally, the mouthpiece of the house to address the king; the speaker of a house of representatives.-a book of selections for declamation.