Definitions for: Megaphone

[n] a cone-shaped acoustic device held to the mouth to intensify and direct the human voice

Webster (1913) Definition: Meg"a*phone, n. [Mega- + Gr. ? voice.]
A device to magnify sound, or direct it in a given direction
in a greater volume, as a very large funnel used as an ear
trumpet or as a speaking trumpet.

See Also: acoustic device