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"
electro-acoustic transducer that converts electrical signals into sounds loud enough to be heard at a distance
"The technician adjusted the volume on the speaker so everyone in the front row could hear the announcement clearly."
the presiding officer of a deliberative assembly
"the leader of the majority party is the Speaker of the House of Representatives"
One who speaks.
"After the new speaker was elected, the chamber immediately began debating the budget resolution."
Alternative letter-case form of speaker (“presiding officer of a legislative body”)
In plain English: A speaker is a person who talks to an audience, often giving a speech or presentation.
"The conference speaker shared his ideas on artificial intelligence with the audience."
The word "speaker" comes from Middle English, which altered an Old English term for someone who speaks. It traveled into modern usage through the combination of the verb to speak and a suffix meaning one who performs that action.