A flexible bag that can be filled with air or gas so that it becomes larger and rounder. Some balloons are small for decoration, while others are huge and can lift people into the air.
The word comes from French “ballon,” meaning a large ball. That likely comes from Italian “ballone,” a big ball, related to the family of words for ball and dance.
Balloons are literally “big balls” by name, just puffed up with air or gas. The same idea of roundness stretches from tiny party balloons to massive hot-air balloons that can carry humans into the sky.
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