- any of various devices, usually electronic, by which speech, music, etc., can be intensified and made audible throughout a room, hall, or the like.
- Audio.
- a device for transforming electric signals into audible sound, most frequently used to reproduce speech and music.
- speaker (def. 4).
- a device for converting audio-frequency signals into the equivalent sound waves by means of a vibrating conical diaphragm
