part of speech: noun

definition 1: a large bag made of thin material designed to inflate and be lifted off the ground when filled with hot air or a gas that is lighter than air.

definition 2: a small bag made of rubber or other strong, light material that can be filled with air, or a gas lighter than air, and used as a decoration or toy.

  • Balloons are a colorful party decoration.


part of speech: verb

inflections: balloons, ballooning, ballooned

definition: to swell like a balloon.

  • His neck ballooned when he was sick with the mumps.

synonyms: blow up, inflate, swell

antonyms: shrink

derivation: balloonist (n.)