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" ;

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 ;

3. (

• Speaker ,

) the presiding officer of a deliberative assembly; "the leader of the majority party is the Speaker of the House of Representatives" ;