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 people who have problems speaking, there are devices such as text-to-speech apps or voice amplifiers. —Emily Kay Votruba, EverydayHealth.com, 31 Jan. 2025

Headphone amplifiers take the signal from your DAC and amplify it with better overall fidelity than the cheapo amps found in most personal electronics. —Parker Hall, WIRED, 30 Jan. 2025

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

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