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

The researchers further enhanced performance by integrating a semiconductor optical amplifier on the same chip. — Rupendra Brahambhatt, Interesting Engineering, 19 July 2026

The humor—dry, humane, occasionally absurd—is ever-present … The Vermont setting, spare and bracing, acts as a quiet amplifier of these idiosyncrasies, while Mason remains attuned to the natural world. — Literary Hub, 10 July 2026

It should be treated as an amplifier of good decision-making. — Maxim Cohen, Forbes.com, 8 July 2026

Engineers learned how to combine an antenna, tuner, amplifier, power source and speaker to convert invisible electromagnetic waves into sound. — Tara Deans, The Conversation, 8 July 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