Definitions:
a small coloured rubber bag that is inflated with air and then sealed at the neck, used as a child's toy or a decoration

a large bag filled with hot air or gas to make it rise in the air, typically one 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 especially for brandy

a stupid person.

swell out in a spherical shape

(with reference to a ball) lob or be lobbed high in the air

travel by hot-air balloon