Definition of "ballooning" []

• Growing rapidly as a balloon (adjective)
• Rising high in the air (adjective)
• The sport or hobby of flying in a balloon (noun)
• Present participle of balloon. (verb)

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• "Friends said that ballooning is in Abruzzo's blood."
• "High altitude ballooning is an emerging hobby, since price of GPS and communications equipment has gotten quite low."
• "If this ballooning is left untreated, it may continue to weaken, burst and bleed into the brain."