meg•a•phonePronunciation: (meg'u-fōn"), [key]
—n., v., -phoned, -phon•ing.
a cone-shaped device for magnifying or directing the voice, chiefly used in addressing a large audience out of doors or in calling to someone at a distance. Cf. bull horn.
to transmit or speak through or as if through a megaphone.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.