megaphone

noun

1. 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.Compare bullhorn.

verb (used with or without object), meg·a·phoned, meg·a·phon·ing.

2. to transmit or speak through or as if through a megaphone.

noun

1. a funnel-shaped instrument used to amplify the voiceSee also loud-hailer

n.1878, coined (perhaps by Thomas Edison, who invented it) from Greek megas “great” (see mega-) + phone “voice” (see fame (n.)). Related: Megaphonic. In Greek, megalophonia meant “grandiloquence,” megalophonos “loud-voiced.”