Balloon

bal-lōōn′, n. an inflated air-tight envelope of paper or silk, constructed to float in the air and carry a considerable weight when filled with heated air or light gas: anything inflated, empty: ( obs. ) a game played with a large inflated ball.— v.i. to ascend in a balloon: to puff out like a balloon.— n. Balloon′ist , an aeronaut. [It. ball one , augmentative of ball a , ball.]