1. Large tough nonrigid bag filled with gas or heated air 
2. Small thin inflatable rubber bag with narrow neck

1. Ride in a hot-air balloon
   "He tried to balloon around the earth but storms forced him to land in China" 
2. Become inflated
   "The sails ballooned"
   - inflate, billow

Derived forms: balloons, ballooned, ballooning

See also: balloonist

Type of: aviate, expand, fly, lighter-than-air craft, pilot, plaything, toy

Encyclopedia: Balloon

• trailer truck
• trailhead
• trailing
• trailing arbutus
• trailing edge
• trailing four o'clock
• trailing windmills
• train
• train depot
• train dispatcher
• train fare
• train of thought
• train oil
• train set
• train station
• train ticket
• train wreck
• trainable
• trainband
• trainbandsman
• trainbearer
• trained
• trained nurse
• trained worker
• trainee