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from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. An aircraft, especially a balloon or dirigible, deriving its lift from the buoyancy of surrounding air rather than from aerodynamic motion.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. An aircraft, such as a dirigible or balloon, that derives its lift from buoyancy rather than from wings or rotors.
  • n. A moored balloon flown in a semi-permanent manner, as a border patrol monitoring balloon affixed at 18,000 feet (~6km).


French aérostat : Greek āero-, aero-; see aero- + Greek statos, standing; see stato-.
(American Heritage® Dictionary of the English Language, Fourth Edition)


  • AFP/Getty Images Then: The aerostat is illuminated in green during the Commonwealth Games opening ceremony at the Jawaharlal Nehru stadium in New Delhi, October 3, 2010.

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  • AFP/Getty Images The aerostat is illuminated in green depicting a tree at opening ceremony.

    The Games Begin

  • The centerpiece will be the 40-meter-wide-by-12-meter-high "aerostat," a balloon on which high-resolution video screens will display images meant to complement performances.

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  • By October, Booker was back on the case with news that Lindstrand had still been unable to gain certification for his "aerostat" balloons and, worse still, while he was unable to sell his products, his rival, Aerophile, had managed to steal a march on him and sell its product as a tourist attraction in Bristol.


  • Kevin Frayer/Associated Press An aerostat rises during the opening ceremony.

    The Games Begin

  • Graham Crouch/Getty Images An $8 million balloon called an aerostat rose from the stadium floor and hung suspended around roof level, beaming images to accompany the thousands of performers below.

    Commonwealth Games Opening Ceremony

  • Kevin Frayer/Associated Press An aerostat was raised during the opening ceremony.

    The Games Begin

  • Indranil Mukherjee/AFP/Getty Images The national flag of Pakistan is displayed on the aerostat.

    The Games Begin

  • The blast was so mighty that it shattered windows two miles away and leveled buildings within 300 yards of the truck, pulling down an observation aerostat.

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  • Tanner credited in particular a tethered aerostat program that allows the military to watch over the battlefield.

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