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

For those who might want a more powerful amplifier in the future, the MSA5500’s internal amplifier can be bypassed and the pre-out sent to a power amp. —Mark Sparrow, Forbes, 5 Dec. 2024

This focuses analogue radio signals from the sky and sends them through a low-noise amplifier that boosts the signal, a bandpass filter that rejects signals outside the frequencies of interest and then through another low-noise amplifier. —The Physics Arxiv Blog, Discover Magazine, 14 Nov. 2024

The vestibule door opens like a crypt, releasing the howl of amplifiers. —Brooks Kubena, The Athletic, 2 Aug. 2024

While the amplifier is contained in the right speaker, the power supply isn’t. —PCMAG, 27 Oct. 2024

Word History

Etymology

amplify + -er entry 2

First Known Use

1546, in the meaning defined above

Phrases Containing amplifier

• amplifier host

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