Simple Definition of amplifier

from our Learner's Dictionary

amplifier

noun

plural amplifiers
: a device that increases the strength of electric signals so that sounds played through an electronic system are louder
He plugged his electric guitar into an amplifier.

called also (informal) amp

Cite this Entry

“Amplifier.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/amplifier. Accessed 22 Jun. 2026.

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