b home Elo Vazquez balloon bal·loon [buh-loon] –noun   1. a. A flexible bag designed to be inflated with hot air or with a gas, such as helium, that is lighter than the surrounding air, causing it to rise and float in the atmosphere. b. Such a bag with sufficient capacity to lift and transport a suspended gondola or other load. c. Such a bag shaped like a figure or object when inflated; an inflatable. 2. A usually round or oblong inflatable rubber bag used as a toy. a b c d e f g h i j k l m n o p q r s t u v w x y z back basket balloon bat bamboo banana band basketball bathroom baton be-bin bath bag