Spēak'er, n.
n. 1. One who speaks. No other speaker of my living actions. Shak.
Sense 2. Especially, 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.
Sense 3. One who is the mouthpiece of others; especially, one who presides over, or speaks for, a deliberative assembly, preserving order and regulating the debates; a chairman; as, the speaker of the House of Commons; the speaker of a House of Representatives.