Definition of multiply verb from the Oxford Advanced Learner's Dictionary

      

    multiply

     verb
    verb
    BrE BrE//ˈmʌltɪplaɪ//
     
    ; NAmE NAmE//ˈmʌltɪplaɪ//
     
    Verb Forms present simple I / you / we / they multiply
    BrE BrE//ˈmʌltɪplaɪ//
     
    ; NAmE NAmE//ˈmʌltɪplaɪ//
     
    he / she / it multiplies
    BrE BrE//ˈmʌltɪplaɪz//
     
    ; NAmE NAmE//ˈmʌltɪplaɪz//
     
    past simple multiplied
    BrE BrE//ˈmʌltɪplaɪd//
     
    ; NAmE NAmE//ˈmʌltɪplaɪd//
     
    past participle multiplied
    BrE BrE//ˈmʌltɪplaɪd//
     
    ; NAmE NAmE//ˈmʌltɪplaɪd//
     
    -ing form multiplying
    BrE BrE//ˈmʌltɪplaɪɪŋ//
     
    ; NAmE NAmE//ˈmʌltɪplaɪɪŋ//
     
    Mathematical terminology
     
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  1. 1   [intransitive, transitive] to add a number to itself a particular number of times The children are already learning to multiply and divide. multiply A by B 2 multiplied by 4 is/equals/makes 8 (= 2×4 = 8) multiply A and B (together) Multiply 2 and 6 together and you get 12. See related entries: Mathematical terminology
  2. 2  [intransitive, transitive] to increase or make something increase very much in number or amount Our problems have multiplied since last year. multiply something Cigarette smoking multiplies the risk of cancer.
  3. 3 [intransitive, transitive] (biology) to reproduce in large numbers; to make something do this Rabbits multiply rapidly. multiply something It is possible to multiply these bacteria in the laboratory.
  4. Word Origin Middle English: from Old French multiplier, from Latin multiplicare.Extra examples 2 multiplied by 4 is 8. If you are cooking for more people, just multiply up the quantities. Just imagine all the problems we’ve been having, multiplied a thousandfold. Multiply these two figures together. micro-organisms that multiply rapidly
See the Oxford Advanced American Dictionary entry: multiply