A brightly colored rubber sac inflated with air and then sealed at the neck, used as a children's toy or a decoration. A large bag filled with hot air or gas to make it rise in the air, typically carrying a basket for passengers. A rounded outline in which the words or thoughts of characters in a comic strip or cartoon are written. A large rounded drinking glass, used for brandy and other drinks. Swell out in a spherical shape; billow. Travel by hot-air balloon.