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

Fender, the guitar maker, is known for its instruments, amplifiers, and digital innovations like the Fender Play music lessons app. —Gary Drenik, Forbes, 16 Jan. 2025

The sound system, including the McIntosh amplifier, is likely worth $80,000. —Daniel Paik, airmail.news, 30 Nov. 2024

Lava has included an instrument output jack too, for cabling to an external amplifier. —Paul Ridden, New Atlas, 5 Nov. 2024

Via the amplifier, the receiving coil sent an audio signal to the headphones, notifying the soldier of a potential land mine. —IEEE Spectrum, 8 Jan. 2025

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