speaker

[spee-ker]
noun
1.
a person who speaks.
2.
a person who speaks formally before an audience; lecturer; orator.
3.
(usually initial capital letter) the presiding officer of the U.S. House of Representatives, the British House of Commons, or other such legislative assembly.
4.
Also called loudspeaker. an electroacoustic device, often housed in a cabinet, that is connected as a component in an audio system, its function being to make speech or music audible.
5.
a book of selections for practice in declamation.
Idioms
6.
be/not beon speakers, British, speaking ( defs 9, 10 ).

Origin:
1275–1325; Middle English; see speak, -er1

speakership, noun
nonspeaker, noun
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
speaker (ˈspiːkə)
 
n
1.  a person who speaks, esp at a formal occasion
2.  See loudspeaker
 
'speakership
 
n

Speaker (ˈspiːkə)
 
n
the presiding officer in any of numerous legislative bodies, including the House of Commons in Britain and Canada and the House of Representatives in the US, Australia, and New Zealand

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Etymonline
Word Origin & History

speaker
c.1300, "one who speaks," agent noun from speak (q.v.). First applied to "person who presides over an assembly" c.1400, from Anglo-Fr. (1376). In ref to the Eng. Parliament, Sir Thomas de Hungerford apparently was the first.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
Yet you can tell they're not native speakers of the language.
When scientists played the songs on underwater speakers, however, other
  males-not females-showed up.
As one put it, there was altogether too much display of the tops of heads as
  speakers bent over to read their prepared talks.
Share your photos, hear from speakers and learn about new techniques that may
  help you capture that picture perfect moment.
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