English

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

     

    balloon

     verb
    verb
    BrE BrE//bəˈluːn//
     
    ; NAmE NAmE//bəˈluːn//
     
    Verb Forms present simple I / you / we / they balloon
    BrE BrE//bəˈluːn//
     
    ; NAmE NAmE//bəˈluːn//
     
    he / she / it balloons
    BrE BrE//bəˈluːnz//
     
    ; NAmE NAmE//bəˈluːnz//
     
    past simple ballooned
    BrE BrE//bəˈluːnd//
     
    ; NAmE NAmE//bəˈluːnd//
     
    past participle ballooned
    BrE BrE//bəˈluːnd//
     
    ; NAmE NAmE//bəˈluːnd//
     
    -ing form ballooning
    BrE BrE//bəˈluːnɪŋ//
     
    ; NAmE NAmE//bəˈluːnɪŋ//
     
     
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  1. 1[intransitive] balloon (out/up) to suddenly swell out or get bigger Her skirt ballooned out in the wind. Unemployment ballooned to fourteen per cent.
  2. 2[intransitive] (also go ballooning) to travel in a hot-air balloon as a sport or for entertainment
  3. Word Origin late 16th cent. (originally denoting a game played with a large inflated leather ball): from French ballon or Italian ballone ‘large ball’.
See the Oxford Advanced American Dictionary entry: balloon