We found 31 dictionaries that define the word firearm:

General (25 matching dictionaries)

1. firearm: Merriam-Webster
2. firearm: Oxford Learner's Dictionaries
3. firearm: American Heritage Dictionary of the English Language
4. firearm: Collins English Dictionary
5. firearm: Vocabulary.com
6. Firearm, firearm: Wordnik
7. firearm: Cambridge Advanced Learner's Dictionary
8. firearm: The Wordsmyth English Dictionary-Thesaurus
9. firearm: Infoplease Dictionary
10. Firearm, firearm: Dictionary.com
11. firearm: Cambridge Essential American English Dictionary
12. Firearm (comics), Firearm: Wikipedia, the Free Encyclopedia
13. Firearm: Online Plain Text English Dictionary
14. firearm: Webster's Revised Unabridged, 1913 Edition
15. firearm: Rhymezone
16. firearm: AllWords.com Multi-Lingual Dictionary
17. firearm: FreeDictionary.org
18. firearm: Mnemonic Dictionary
19. firearm: TheFreeDictionary.com
20. firearm: Wikimedia Commons US English Pronunciations
21. firearm: Wiktionary
22. firearm: Webster's New World College Dictionary, 4th Ed.
23. firearm: Longman Dictionary of Contemporary English

Business (2 matching dictionaries)

24. THE 'LECTRIC LAW LIBRARY'S REFERENCE ROOM (No longer online)
25. firearm: Legal dictionary

Computing (1 matching dictionary)

26. firearm: Encyclopedia

Medicine (1 matching dictionary)

27. firearm: Medical dictionary

Slang (1 matching dictionary)

28. Firearm: Urban Dictionary

Sports (1 matching dictionary)

29. Firearm: Sports Definitions

(Note: See firearms as well.)

Definitions from Wiktionary ( ) ▸ noun:  A personal weapon that uses explosive powder to propel a projectile often made of lead. Similar: piece, small-arm, fire arm, projectile, fire, fireball, powder, gunfire, firework, bullet, more... Opposite: weapon, non-firearm, unarmed, melee weapon, projectile weapon Types: handgun, pistol, revolver, rifle, shotgun, machine gun, submachine gun, carbine, more... Phrases: Automatic firearm, Repeating firearm, semiautomatic firearm, revolving firearm, firearm and tool mark examiners, more... Adjectives: loaded, first, unlicensed, small, automatic, only, illegal, concealed, particular, own, unregistered Colors:     black,     silver,     gray,     dark gray,     gunmetal, more... ▸ Words similar to firearm ▸ Usage examples for firearm ▸ Idioms related to firearm ▸ Wikipedia articles (New!) ▸ Popular adjectives describing firearm ▸ Words that often appear near firearm ▸ Rhymes of firearm ▸ Invented words related to firearm