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balloon - definition and synonyms


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noun [countable] balloon pronunciation in American English /bəˈlun/
Word Forms
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  1. 1
    a large strong bag filled with gas or hot air that can float in the air. Some balloons have a large basket hanging under them in which people can travel.
    Synonyms and related words
    1. a.
      a small colored bag of thin rubber that you fill with air, used as a child’s toy or a decoration
    2. b.
      a small bag that a doctor puts into a part of your body and fills with air in order to force something out
  2. From our crowdsourced Open Dictionary
    the balloon goes up if the balloon goes up, a ​situationsuddenly ​becomes extremely ​serious or ​bad
    Submitted by Caleb Judy from United States on 06/09/2015


to fall over forwards so that your face hits the ground or another surface

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the activity of exploring abandoned buildings and other manmade structures

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