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

And for folks new to the vinyl universe, not having to immediately invest in audio separates like a pre-amp, amplifier, cables, speakers and so on is another huge bonus in my opinion. —New Atlas, 6 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

Psychedelics are non-specific amplifiers of existing personality traits. —Erica Rex, STAT, 19 Feb. 2026

Kennedy said Bluetooth Low Energy only has a 10- to 15-foot radius, but with signal amplifiers and high-gain antennas, the radius can extend to several hundred feet. —Kierra Frazier, CBS News, 18 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