|1.||[ noun ] (transportation) large tough non-rigid bag filled with gas or hot air|
|Related terms:||lighter-than-air_craft hot-air_balloon meteorological_balloon trial_balloon ripcord envelope|
|2.||[ noun ] small thin inflatable rubber bag with narrow neck|
|3.||[ verb ] (transportation) ride in a hot-air balloon|
"He tried to balloon around the earth but storms forced him to land in China"
|Related terms:||fly balloonist|
|4.||[ verb ] become inflated|
"The sails ballooned"
|Related terms:||expand reflate inflation|