Speaker \Speak"er\, n.

1. One who speaks. Specifically:
   (a) 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.
   (b) 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.

2. A book of selections for declamation. [U. S.]

Source: Webster's Revised Unabridged Dictionary (1913)