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

While the headphone outputs provided by integrated hi-fi amplifiers are often of a basic quality, the Quad 3 seeks to offer a level of performance akin to driving loudspeakers. —Mark Sparrow, Forbes.com, 13 June 2025

In 1961, with his parents on vacation, Wilson, his brothers, Love and their friend Al Jardine rented guitars, a bass, drums and an amplifier with the food money their parents had left behind and staged a concert for their friends. —Steve Marble, Los Angeles Times, 11 June 2025

In Donald Trump’s first administration, he was surrounded by buffers and filters—but in his second, he’s surrounded by amplifiers. —The Editors, The Atlantic, 7 June 2025

Tunes come from a Harman Kardon sound system with a 750 watt amplifier and 5.1 surround sound capability. —Tony Leopardo, Mercury News, 2 June 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