We found 9 dictionaries that define the word balloonists:

General (7 matching dictionaries)

1. balloonists: Merriam-Webster
2. balloonists: Collins English Dictionary
3. balloonists: Vocabulary.com
4. balloonists: Wordnik
5. balloonists: Cambridge Advanced Learner's Dictionary
6. balloonists: Wiktionary
7. balloonists: TheFreeDictionary.com

Computing (1 matching dictionary)

8. balloonists: Encyclopedia

Medicine (1 matching dictionary)

9. balloonists: Medical dictionary

(Note: See balloonist as well.)

Definitions from Wiktionary (balloonist) ▸ noun:  A person who flies in balloons, especially in hot-air balloons. ▸ Also see balloonist ▸ Words similar to balloonists ▸ Usage examples for balloonists ▸ Idioms related to balloonists ▸ Wikipedia articles (New!) ▸ Popular adjectives describing balloonists ▸ Words that often appear near balloonists ▸ Rhymes of balloonists ▸ Invented words related to balloonists