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

Audio brand Topping has addressed this problem with the launch of its DX1 II, a DAC and headphone amplifier designed to bring hi-fi sound with power, detail and analog character at an affordable price. — Mark Sparrow, Forbes.com, 30 June 2026

Beming adds that base-station filter characteristics and power amplifiers must be tailored to suit the specific band, to prevent cochannel interference, and to protect other services or spectrum outside the band. — Stephen Cousins, IEEE Spectrum, 25 June 2026

To overcome this, telecom companies use optical amplifiers placed along the route. — Christopher McFadden, Interesting Engineering, 13 June 2026

The sound came mostly from the stage amplifiers. — Air Mail, 30 May 2026

Word History

Etymology

amplify + -er entry 2

First Known Use

1551, in the meaning defined above

Phrases Containing amplifier

• amplifier host

Rhymes for amplifier

• acquire
• attire
• bonfire
• campfire
• ceasefire
• conspire
• desire
• enquire
• entire
• greenbrier
• gunfire
• homebuyer

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