amplifier

noun

am·​pli·​fi·​er ˈam-plə-ˌfī(-ə)r 

: one that amplifies

specifically : an electronic device (as in a stereo system) for amplifying voltage, current, or power

Examples of amplifier in a Sentence

He plugged his electric guitar into an amplifier.

Recent Examples on the Web

Swartz absorbed the increase in cost for the parts used on guitars but passed along the increase to customers buying pickups — the component that allows a guitar to produce sound through an amplifier. —Paul Flahive, Austin American Statesman, 16 Mar. 2026

Equipped with three Class-H digital amplifiers, two angled tweeters, and a mid-woofer, the Play should be up to the task of filling any room with Sonos' signature sound. —New Atlas, 11 Mar. 2026

Pale blue yarn stretched from the loom to a warping peg affixed to the lip of a Fender Deluxe Reverb amplifier, now requisitioned as part of the weaving setup. —Hazlitt, 11 Mar. 2026

Finally, the whole chain became a closed loop by driving the Marshall amplifier near saturation, which among other things extends the sustain. —IEEE Spectrum, 25 Feb. 2026

Word History

Etymology

amplify + -er entry 2

First Known Use

1551, in the meaning defined above

Phrases Containing amplifier

• amplifier host

Rhymes for amplifier

• clarifier
• classifier
• gasifier
• magnifier
• modifier
• multiplier
• occupier
• pacifier
• purifier
• qualifier
• quantifier
• rectifier

Kids Definition

amplifier

noun

am·​pli·​fi·​er ˈam-plə-ˌfī(-ə)r 

: one that amplifies

especially : a device usually using electron tubes or transistors to obtain an increase of voltage, current, or power

Medical Definition

amplifier

noun

am·​pli·​fi·​er ˈam-plə-ˌfī(ə)r 

: one that amplifies

specifically : an electronic device (as in a computer or sound-reproducing system) for amplifying voltage, current, or power