We found 25 dictionaries that define the word air gun:

General (20 matching dictionaries)

1. air gun: Merriam-Webster
2. air gun: American Heritage Dictionary of the English Language
3. air gun: Collins English Dictionary
4. air gun: Vocabulary.com
5. air-gun: Wordnik
6. air-gun, air gun: Wiktionary
7. air gun: The Wordsmyth English Dictionary-Thesaurus
8. air gun: Infoplease Dictionary
9. Air gun, air gun: Dictionary.com
10. Air gun (seismic), Air gun: Wikipedia, the Free Encyclopedia
11. Air gun: Online Plain Text English Dictionary
12. air gun: Rhymezone
13. Air gun: AllWords.com Multi-Lingual Dictionary
14. air-gun: Webster's 1828 Dictionary
15. air gun: FreeDictionary.org
16. air gun: Mnemonic Dictionary
17. air gun: TheFreeDictionary.com
18. air gun: Merriam-Webster

Computing (1 matching dictionary)

19. air gun: Encyclopedia

Medicine (1 matching dictionary)

20. air gun: Merriam-Webster Medical Dictionary

Slang (1 matching dictionary)

21. air gun: Urban Dictionary

Tech (2 matching dictionaries)

22. AUTOMOTIVE TERMS (No longer online)
23. Schlumberger Oilfield Glossary (No longer online)

(Note: See air_guns as well.)

Definitions from Wiktionary (air gun) ▸ noun:  A gun that propels a projectile by compressed air or similar compressed gas (such as carbon dioxide). Similar: airgun, air compressor, air fountain, spray gun, air motor, pneumatic device, airbrush, air drill, airspray, air engine, more... Opposite: real gun, firearm, bullet gun Types: pellet gun, BB gun, paintball gun, airsoft gun, more... Phrases: hot air gun, Air gun laws, 100 mm air defense gun KS-19, 130 mm air defense gun KS-30, 76 mm air defense gun M1938, more... Adjectives: overbore, pan, safetied, calibred, rifled, action, cannon, smoothbore, small-bore, rem, progun ▸ Words similar to air gun ▸ Usage examples for air gun ▸ Idioms related to air gun ▸ Wikipedia articles (New!) ▸ Words that often appear near air gun ▸ Rhymes of air gun ▸ Invented words related to air gun