/ ˌlaʊdˈspiːkə(r); NAmE / noun
1.
a piece of equipment that changes electrical signals into sound, used in public places for announcing things, playing music, etc. :
Their names were called over the loudspeaker .
—see also public address system , Tannoy
2.
( old-fashioned ) the part of a radio or piece of musical equipment that the sound comes out of
SYN speaker