speaker

Noun

• the presiding officer of a deliberative assembly
  • the leader of the majority party is the Speaker of the House of Representatives
    

• electro-acoustic transducer that converts electrical signals into sounds loud enough to be heard at a distance

• 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
    

Related words

• Synonyms: 
  Speaker , loudspeaker , speaker unit , loudspeaker system , speaker system , talker , utterer , verbalizer , verbaliser