free balloon

noun

Definition of free balloon

: a balloon which can be made to ascend by the use of ballast and to descend by the release of gas but which cannot be guided in flight

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Cite this Entry

“Free balloon.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/free%20balloon. Accessed 9 December 2019.

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