speaker

noun

1. someone who expresses in language; someone who talks (especially someone who delivers a public speech or someone especially garrulous)

   noun.person

   Examples

   The speaker at commencement.

   Synonyms talker utterer verbaliser verbalizer

   Source: WordNet 3.0

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

   noun.artifact

   Synonyms loudspeaker loudspeaker system speaker system speaker unit

   Source: WordNet 3.0

3. the presiding officer of a deliberative assembly

   noun.person

   Examples

   The leader of the majority party is the Speaker of the House of Representatives.

   Source: WordNet 3.0

4. One who speaks.

   noun

   Source: webster1913