WordReference Random House Learner's Dictionary of American English © 2020mul•ti•pli•ca•tion^{} */ˌmʌltəplɪˈkeɪʃən/USA pronunciation*
n. [uncountable]
- the act or process of multiplying or the state of being multiplied.
- a mathematical operation, symbolized by
*a* × *b, a *· *b, a *&startimes;

*b,* or *ab,* in which *a* is to be added to itself as many times as there are units in *b*.

See -plic-.
WordReference Random House Unabridged Dictionary of American English © 2020mul•ti•pli•ca•tion^{}
*(mul′tə pli kā***′**shən),USA pronunciation n.
- the act or process of multiplying or the state of being multiplied.
- [Arith.]a mathematical operation, symbolized by
*a* × *b, a &bultimes;*

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.
- [Math.]any generalization of this operation applicable to numbers other than integers, as fractions or irrational numbers.

**mul′ti•pli•ca****′**tion•al, adj. - Latin
*multiplicātiōn-* (stem of *multiplicātiō*). See multi-, plication - Middle English
*multiplicacio*(*u*)*n* 1350–1400

Collins Concise English Dictionary © HarperCollins Publishers::

**multiplication** /ˌmʌltɪplɪˈkeɪʃən/ n - 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 = 2 ^{1}⁄_{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

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