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

The entire film is a cinematic amplifier turned up to eleven. —Scott Phillips, Forbes.com, 1 Aug. 2025

While amplifier and receiver are often used interchangeably, an amplifier simply describes any device that amplifies an audio signal, and largely refers to a much broader range of products than receivers. —Bestreviews, Mercury News, 29 July 2025

But that was strictly between me and him, the other people were just amplifiers, devices used to enhance a victory entirely contained within the walls of our friendship. —Literary Hub, 23 July 2025

In my tests, Gemini Live AI Mode was able to tell me the reason my guitar amplifier wasn't working. —PC Magazine, 17 July 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