An archaic or alternative spelling of 'balloon,' a bag filled with gas that floats in air.
From French 'ballon,' derived from Italian 'ballone' (large ball). The 'balloen' spelling represents an older English orthography from the 17th-18th centuries.
Before standardized spelling, people wrote 'balloon' as 'balloen,' 'balon,' and dozens of other ways—seeing old spellings is like watching English pronunciation freeze in time.
Complete word intelligence in one call. Free tier — 50 lookups/day.