loudspeaker

[ loud-spee-ker ]
/ ˈlaʊdˌspi kər /

noun

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.
  1. a device for transforming electric signals into audible sound, most frequently used to reproduce speech and music.
  2. speaker(def 4).

Origin of loudspeaker

First recorded in 1880–85; loud + speaker
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for loudspeaker

loudspeaker

/ (ˌlaʊdˈspiːkə) /

noun

a device for converting audio-frequency signals into the equivalent sound waves by means of a vibrating conical diaphragmSometimes shortened to: speaker Also called: reproducer
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012