Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A funnel-shaped device used to direct and amplify the voice.
  • noun A bullhorn.
  • transitive & intransitive verb To transmit (a message) or speak through a megaphone.

from The Century Dictionary.

  • noun A large speaking-trumpet of a conical form.
  • noun An instrument devised by Edison for assisting hearing, adapted for use by deaf persons or for the perception of ordinary sounds at great distances.

from the GNU version of the Collaborative International Dictionary of English.

  • noun 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.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun A portable, usually hand-held, funnel-shaped device that is used to amplify a person’s natural voice toward a targeted direction.
  • verb transitive, intransitive To use a megaphone.
  • noun organic chemistry a cytotoxic neolignan obtained from the laurel aniba megaphylla

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a cone-shaped acoustic device held to the mouth to intensify and direct the human voice

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

From mega- +‎ phone.

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Examples

Comments

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  • 1 megaphone = 10^^12 microphones

    February 23, 2008