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English definition of “multiply”

multiply

verb [I or T] uk   /ˈmʌl.tɪ.plaɪ/ us    /-t̬ɪ-/
to increase very much in number, or (in mathematics) to add a number to itself a particular number of times: In warm weather these germs multiply rapidly. If you multiply seven by 15 you get 105.
multiplication
noun [U] uk   /ˌmʌl.tɪ.plɪˈkeɪ.ʃən/ us    /-t̬ɪ-/
(Definition of multiply from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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