Noun speaker has 3 senses
  1. speaker, talker, utterer, verbalizer, verbaliser - someone who expresses in language; someone who talks (especially someone who delivers a public speech or someone especially garrulous); "the speaker at commencement"; "an utterer of useful maxims"
    --1 is a kind of articulator
    --1 has particulars:
     alliterator; caller, caller-up, phoner, telephoner; chatterer, babbler, prater, chatterbox, magpie, spouter; conversationalist, schmoozer; dictator; drawler; driveller, jabberer; ejaculator; growler; inquirer, enquirer, questioner, querier, asker; lecturer; lisper; mentioner; motormouth; mutterer, mumbler; narrator, storyteller, teller; orator, speechmaker, rhetorician, public speaker, speechifier; prattler; ranter, raver; reciter; native speaker; stammerer, stutterer; stentor; talking head; venter; vociferator; voicer; wailer; whisperer; witness, witnesser, informant
    Derived form: verb speak1
  2. loudspeaker, speaker, speaker unit, loudspeaker system, speaker system - electro-acoustic transducer that converts electrical signals into sounds loud enough to be heard at a distance
    --2 is a kind of electro-acoustic transducer
    --2 is a part of
     public address system, P.A. system, PA system, P.A., PA
    --2 has particulars:
     bullhorn, loud-hailer; squawk box, squawker, intercom speaker; tannoy; tweeter; woofer
  3. Speaker - the presiding officer of a deliberative assembly; "the leader of the majority party is the Speaker of the House of Representatives"
    --3 is a kind of
    presiding officer
,
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