• (architecture) A ball or globe on the top of a pillar, church, etc.

    "the balloon of St. Paul's Cathedral in London"

  • A game played with a large inflated ball.
  • Such an object designed to transport people through the air.
  • A type of glass cup, sometimes used for brandy.
  • (pyrotechnics) A bomb or shell.
  • (slang) A woman’s breast.
  • Such an object as a child’s toy.
  • A speech bubble.
  • (chemistry) A round vessel, usually with a short neck, to hold or receive whatever is distilled; a glass vessel of a spherical form.
  • (engraving) The outline enclosing words represented as coming from the mouth of a pictured figure.
  • An inflatable buoyant object, often (but not necessarily) round and flexible.
  • (medicine) A sac inserted into part of the body for therapeutic reasons; such as angioplasty.


  • (intransitive) To increase or expand rapidly.

    "His stomach ballooned from eating such a large meal."

  • (transitive) To take up in, or as if in, a balloon.
  • (intransitive) To go up or voyage in a balloon.
  • (intransitive) To increase or expand rapidly.

    "Prices will balloon if we don't act quickly."

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