Balloon is a flexible bag that can be inflated with a gas, such as helium, hydrogen, nitrous oxide, oxygen, or air.
Modern balloons are made from materials such as rubber, latex, polychloroprene, or a nylon fabric.
The term "balloon" also refers to:
1. A type of aircraft that remains aloft due to its buoyancy
2. A speech bubble in comics
3. A sudden increase in size or amount
4. In medicine, a device used in angioplasty