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

      

    double

     verb
    verb
    BrE BrE//ˈdʌbl//
     
    ; NAmE NAmE//ˈdʌbl//
     
    Verb Forms present simple I / you / we / they double
    BrE BrE//ˈdʌbl//
     
    ; NAmE NAmE//ˈdʌbl//
     
    he / she / it doubles
    BrE BrE//ˈdʌblz//
     
    ; NAmE NAmE//ˈdʌblz//
     
    past simple doubled
    BrE BrE//ˈdʌbld//
     
    ; NAmE NAmE//ˈdʌbld//
     
    past participle doubled
    BrE BrE//ˈdʌbld//
     
    ; NAmE NAmE//ˈdʌbld//
     
    -ing form doubling
    BrE BrE//ˈdʌblɪŋ//
     
    ; NAmE NAmE//ˈdʌblɪŋ//
     
     
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    become twice as much/many
  1. 1  [intransitive, transitive] to become, or make something become, twice as much or as many Membership almost doubled in two years. double something Double all the quantities in the recipe to make enough for eight people.
  2. fold
  3. 2[transitive] double something (over) to bend or fold something so that there are two layers She doubled the blanket and put it under his head.
  4. in baseball
  5. 3[intransitive] to hit the ball far enough for you to get to second base He doubled to left field.
  6. Word Origin Middle English: via Old French from Latin duplus, from duo ‘two’ The verb is from Old French dobler, from late Latin duplare, from duplus.Extra examples The party almost doubled its share of the vote to 21%. The price of houses has nearly doubled in the last ten years. The town has approximately doubled in size since 1960. This percentage could easily double. Phrasal Verbsdouble as somethingdouble backdouble overdouble up
See the Oxford Advanced American Dictionary entry: double