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Definition of Balloon
1. Noun. Large tough nonrigid bag filled with gas or heated air.
Specialized synonyms: Hot-air Balloon, Meteorological Balloon, Trial Balloon
Generic synonyms: Lighter-than-air Craft
Derivative terms: Balloonist
2. Verb. Ride in a hot-air balloon. "He tried to balloon around the earth but storms forced him to land in China"
3. Noun. Small thin inflatable rubber bag with narrow neck.
4. Verb. Become inflated. "The sails ballooned"
Specialized synonyms: Reflate
Generic synonyms: Expand
Derivative terms: Inflation
Definition of Balloon
1. n. A bag made of silk or other light material, and filled with hydrogen gas or heated air, so as to rise and float in the atmosphere; especially, one with a car attached for aërial navigation.
2. v. t. To take up in, or as if in, a balloon.
3. v. i. To go up or voyage in a balloon.
Definition of Balloon
1. to swell out [v -ED, -ING, -S]
Medical Definition of Balloon
1.
1. A bag made of silk or other light material, and filled with hydrogen gas or heated air, so as to rise and float in the atmosphere; especially, one with a car attached for aerial navigation.
2. A ball or globe on the top of a pillar, church, etc, as at St. Paul's, in London.
3.