A speaker can be anyone who speaks, especially when giving a Speech , or Lecture , especially a skilled Orator (see also Public Speaking ).
Speaker (politics) , in politics, the presiding officer in many legislative assemblies.
In Linguistics , a speaker is who utters a message, and is typically the center of Deixis in the message; (s)he refers to himself or herself with the first-person pronoun.
Also in linguistics, a speaker is a user of a Spoken Language , as opposed to a signer, a user of a Sign Language ; or anyone who masters and uses a language, while only a Native Speaker has it as his or her mother tongue.
As an object:
Computer Speaker , a computer peripheral that reproduces speech and/or music.
Loudspeaker , an electronic device used to transform varying electric current into audible sound.
