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[muhl-tuh-pli-key-shuh n] /ˌmʌl tə plɪˈkeɪ ʃən/
the act or process of multiplying or the state of being multiplied.
Arithmetic. a mathematical operation, symbolized by a × b, a ⋅ b, a ∗ b, or ab, and signifying, when a and b are positive integers, that a is to be added to itself as many times as there are units in b; the addition of a number to itself as often as is indicated by another number, as in 2×3 or 5×10.
Mathematics. any generalization of this operation applicable to numbers other than integers, as fractions or irrational numbers.
Origin of multiplication
1350-1400; Middle English multiplicacio(u)n < Latin multiplicātiōn- (stem of multiplicātiō). See multi-, plication
Related forms
multiplicational, adjective
nonmultiplication, noun
nonmultiplicational, adjective
overmultiplication, noun
remultiplication, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for multiplication


an arithmetical operation, defined initially in terms of repeated addition, usually written a × b, a.b, or ab, by which the product of two quantities is calculated: to multiply a by positive integral b is to add a to itself b times. Multiplication by fractions can then be defined in the light of the associative and commutative properties; multiplication by 1/n is equivalent to multiplication by 1 followed by division by n: for example 0.3 × 0.7 = 0.3 × 7/10 = (0.3 × 7)/10 = 21/10 = 0.21
the act of multiplying or state of being multiplied
the act or process in animals, plants, or people of reproducing or breeding
Derived Forms
multiplicational, adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for multiplication

mid-14c., from Old French multiplicacion (12c.) "multiplication, duplication; multiplicity, diversity," from Latin multiplicationem (nominative multiplicatio), noun of action from past participle stem of multiplicare (see multiply). Mathematical sense is attested from late 14c.

Online Etymology Dictionary, © 2010 Douglas Harper
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multiplication in Medicine

multiplication mul·ti·pli·ca·tion (mŭl'tə-plĭ-kā'shən)

  1. The act or process of multiplying or the condition of being multiplied.

  2. Propagation of plants and animals; procreation.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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multiplication in Science
  1. A mathematical operation performed on a pair of numbers in order to derive a third number called a product. For positive integers, multiplication consists of adding a number (the multiplicand) to itself a specified number of times. Thus multiplying 6 by 3 means adding 6 to itself three times. The operation of multiplication is extended to other real numbers according to the rules governing the multiplicational properties of positive integers.

  2. Any of certain analogous operations involving expressions other than real numbers.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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