• synonyms


  1. a person or thing that multiplies.
  2. Arithmetic. a number by which another is multiplied.
  3. Physics. a device for intensifying some effect.
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Origin of multiplier

late Middle English word dating back to 1425–75; see origin at multiply1, -er1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for multiplier


  1. a person or thing that multiplies
  2. the number by which another number, the multiplicand, is multipliedSee also multiplicand
  3. physics any device or instrument, such as a photomultiplier, for increasing an effect
  4. economics
    1. the ratio of the total change in income (resulting from successive rounds of spending) to an initial autonomous change in expenditure
    2. (as modifier)multiplier effects
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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

Word Origin and History for multiplier


late 15c., agent noun from multiply.

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Online Etymology Dictionary, © 2010 Douglas Harper

multiplier in Science


  1. The number by which another number is multiplied.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.