| balloon | (noun) large tough nonrigid bag filled with gas or heated air | - |
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| (noun) small thin inflatable rubber bag with narrow neck | - |
| (verb) become inflated | Synonyms: billow, inflate |
| (verb) ride in a hot-air balloon | - |
| balloonfish | (noun) similar to but smaller than porcupinefish | Synonyms: Diodon holocanthus |
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| ballooning | (noun) flying in a balloon | - |
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| balloonist | (noun) someone who flies a balloon | - |
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| halloo | (noun) a shout to attract attention | - |
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| (verb) shout `halloo', as when greeting someone or attracting attention | - |
| (verb) urge on with shouts | - |