SPEAKER

noun one who speaks.

2. speaker ·noun a book of selections for declamation.

3. speaker ·noun 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.

4. speaker ·noun 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.