say it: buh-LOON
balloon is a noun and verb meaning "large tough nonrigid bag filled with gas or heated air". It carries 4 recorded senses.
large tough nonrigid bag filled with gas or heated air
small thin inflatable rubber bag with narrow neck
ride in a hot-air balloon
“He tried to balloon around the earth but storms forced him to land in China”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for balloon come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.