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

But the cold hard truth of business is that the biggest, most unsung career amplifier and accelerator is the quality of your execution. —Suzy Welch, CNBC, 8 May 2025

As well as handling digital sources, the new amplifier also has a stereo analog input. —Mark Sparrow, Forbes, 18 Mar. 2025

The excitement filled the room as the spotlight focused on the stage, which featured a complete drum set, several amplifiers, microphones, a keyboard, and a synthesizer. —Laura Sirikul, Forbes.com, 19 Apr. 2025

With a nominal impedance of 4 ohms and sensitivity of 89 dB, high-power, high-current, solid-state amplifiers will bring out the very best in these speakers. —Robert Ross, Robb Report, 26 Mar. 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