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

Mike's Music inventory includes guitars, banjos, mandolins, keyboards, drums, amplifiers, pedals, accessories and more. —Kaycee Sloan, The Enquirer, 18 July 2025

Turntable and audio brand Pro-Ject has announced the Head Box E, a micro-sized headphone amplifier that’s able to drive even the most demanding pair of headphones. —Mark Sparrow, Forbes.com, 15 July 2025

There’s power in seeing age not as a limit but as an amplifier of style. —Karissa Mitchell, Essence, 10 July 2025

Atmos sound processors have been deployed in a unique configuration and 28 amplifiers for the loudspeakers are spread across three locations in the building, to cover the large space. —Carolyn Giardina, Variety, 13 May 2025

Word History

Etymology

amplify + -er entry 2

First Known Use

1546, 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