Speaker for the Dead in the Ender's Game series

Loudspeaker, an electromechanical device producing sound

Tris Speaker, American baseball player

Andrew Speaker, American lawyer who travelled with antibiotic-resistant tuberculosis

Speaker (politics), the presiding officer in a legislative assembly

HMS Speaker (D90), a WWII Royal Navy aircraft carrier

Deixis in linguistics relies on the point of view of a speaker

Raymond Speaker, Canadian politician

Speaker of a House of Commons

A person who is using speech communication, or sometimes sign language

Orator, giving a speech or lecture; see also public speaking

Speaker (song), first single for David Banner's album The Greatest Story Ever Told