a baglike fabric, etc container filled with hot air or a gas lighter than air so as to rise and float in the atmosphere
an inflatable usu brightly coloured rubber bag used as a toy
(used before a noun) resembling or suggesting a balloon
a balloon sleeve
a line enclosing words spoken or thought by a character, esp in a cartoon
= balloon glass
when the balloon goes up
informal when the trouble starts or the action begins
[French ballon large football, balloon, from Italian dialect ballone large football, augmentative of balla ball, of Germanic origin]