[ am-pluh-fahy-er ]
/ ˈæm pləˌfaɪ ər /


a person or thing that amplifies or enlarges.
an electronic component or circuit for amplifying power, current, or voltage.

Origin of amplifier

First recorded in 1540–50; amplify + -er1 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for amplifier

British Dictionary definitions for amplifier


/ (ˈæmplɪˌfaɪə) /


an electronic device used to increase the strength of the signal fed into it
such a device used for the amplification of audio frequency signals in a radio, etc
photog an additional lens for altering the focal length of a camera lens
a person or thing that amplifies

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Culture definitions for amplifier


In electronics, a device that takes a small electric signal and converts it into a large one. Amplifiers are used in stereo systems, electric guitars, and loudspeakers.

The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.