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We found 53 dictionaries with English definitions that include the word firewall:
Click on the first link on a line below to go directly to a page where "firewall" is defined.

General (19 matching dictionaries)

1. firewall: Merriam-Webster.com [home, info]
2. firewall: Oxford Learner's Dictionaries [home, info]
3. firewall: American Heritage Dictionary of the English Language [home, info]
4. firewall: Collins English Dictionary [home, info]
5. firewall: Vocabulary.com [home, info]
6. firewall: Macmillan Dictionary [home, info]
7. Firewall, firewall: Wordnik [home, info]
8. firewall: Cambridge Advanced Learner's Dictionary [home, info]
9. firewall: Wiktionary [home, info]
10. firewall: Dictionary.com [home, info]
11. firewall: UltraLingua English Dictionary [home, info]
12. Firewall (Henning Mankell novel), Firewall (Mankell novel), Firewall (Person of Interest), Firewall (computer), Firewall (computing), Firewall (construction), Firewall (engine), Firewall (film), Firewall (networking), Firewall (physics), Firewall: Wikipedia, the Free Encyclopedia [home, info]
13. firewall: Rhymezone [home, info]
14. firewall: Free Dictionary [home, info]
15. firewall: Mnemonic Dictionary [home, info]
16. firewall: LookWAYup Translating Dictionary/Thesaurus [home, info]
17. firewall: Dictionary/thesaurus [home, info]

Art (1 matching dictionary)

18. firewall: ODLIS: Online Dictionary of Library and Information Science [home, info]

Business (9 matching dictionaries)

19. Firewall: MoneyGlossary.com [home, info]
20. firewall: INVESTORWORDS [home, info]
21. Firewall: E-Commerce and Marketing Dictionary of Terms [home, info]
22. Firewall: Bloomberg Financial Glossary [home, info]
23. FIREWALL: C-SPAN Congressional Glossary [home, info]
24. Firewall: Construction Term Glossary [home, info]
25. Firewall: Investopedia [home, info]
26. Firewall (networking), Firewall: Financial dictionary [home, info]
27. firewall: BusinessDictionary.com [home, info]

Computing (18 matching dictionaries)

28. Firewall: Webster's New World Hacker Dictionary [home, info]
29. firewall: Free On-line Dictionary of Computing [home, info]
30. firewall: Netlingo [home, info]
31. Firewall, firewall: CCI Computer [home, info]
32. Firewall: The Microsoft Lexicon [home, info]
33. firewall: CNET Internet Glossary [home, info]
34. firewall: Computer Telephony & Electronics Dictionary and Glossary [home, info]
35. firewall: Glossary of Internet Terms [home, info]
36. Firewall: Tech Terms Computer Dictionary [home, info]
37. Firewall: Internet Terms [home, info]
38. Firewall, Firewall: Internet Terms [home, info]
39. Firewall: Linktionary Networking Glossary [home, info]
40. Firewall: Karbo's Dictionary [home, info]
41. firewall: Webopedia [home, info]
42. firewall: Hacking Lexicon [home, info]
43. firewall: I T Glossary [home, info]
44. Firewall: Technopedia [home, info]
45. Firewall (networking), firewall: Encyclopedia [home, info]

Medicine (1 matching dictionary)

46. firewall: online medical dictionary [home, info]

Tech (5 matching dictionaries)

47. Firewall: Webster's New World Telecom Dictionary [home, info]
48. Firewall: AUTOMOTIVE TERMS [home, info]
49. Firewall: Glossary of Energy Terms [home, info]
50. FIREWALL: Space and Electronic Warfare Lexicon [home, info]
51. Firewall: Web Hosting Glossary [home, info]

(Note: See firewalls for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (firewall) ▸ noun:  the application of maximum thrust ("He slammed the throttle to the firewall") ▸ noun:  fireproof (or fire-resistant) wall designed to prevent the spread of fire through a building or a vehicle ▸ noun:  (computing) a security system consisting of a combination of hardware and software that limits the exposure of a computer or computer network to attack from crackers; commonly used on local area networks that are connected to the internet ▸ Also see firewalls ▸ Words similar to firewall ▸ Usage examples for firewall ▸ Idioms related to firewall (New!) ▸ Popular adjectives describing firewall ▸ Words that often appear near firewall ▸ Rhymes of firewall ▸ Invented words related to firewall