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We found 38 dictionaries with English definitions that include the word fortress:
Click on the first link on a line below to go directly to a page where "fortress" is defined.

General (29 matching dictionaries)

1. fortress: Merriam-Webster.com [home, info]
2. fortress: Oxford Learner's Dictionaries [home, info]
3. fortress: American Heritage Dictionary of the English Language [home, info]
4. fortress: Collins English Dictionary [home, info]
5. fortress: Vocabulary.com [home, info]
6. fortress: Macmillan Dictionary [home, info]
7. Fortress, fortress: Wordnik [home, info]
8. fortress: Cambridge Advanced Learner's Dictionary [home, info]
9. fortress: Wiktionary [home, info]
10. fortress: Webster's New World College Dictionary, 4th Ed. [home, info]
11. fortress: The Wordsmyth English Dictionary-Thesaurus [home, info]
12. fortress: Infoplease Dictionary [home, info]
13. Fortress, fortress: Dictionary.com [home, info]
14. fortress: Online Etymology Dictionary [home, info]
15. fortress: UltraLingua English Dictionary [home, info]
16. fortress: Cambridge Dictionary of American English [home, info]
17. Fortress (Alter Bridge album), Fortress (Grin), Fortress (Protest the Hero album), Fortress (Sister Hazel album), Fortress (Thee Oh Sees song), Fortress (cancelled video game), Fortress (card game), Fortress (chess), Fortress (disambiguation), Fortress (programming language), Fortress (solitaire), Fortress (tower defense video game), Fortress (video game), Fortress, The Fortress (Alberta), The Fortress (How I Met Your Mother): Wikipedia, the Free Encyclopedia [home, info]
18. Fortress: Online Plain Text English Dictionary [home, info]
19. fortress: Webster's Revised Unabridged, 1913 Edition [home, info]
20. fortress: Rhymezone [home, info]
21. fortress: AllWords.com Multi-Lingual Dictionary [home, info]
22. fortress: Webster's 1828 Dictionary [home, info]
23. fortress: Free Dictionary [home, info]
24. fortress: Mnemonic Dictionary [home, info]
25. fortress: WordNet 1.7 Vocabulary Helper [home, info]
26. fortress: LookWAYup Translating Dictionary/Thesaurus [home, info]
27. fortress: Dictionary/thesaurus [home, info]

Business (2 matching dictionaries)

28. fortress: Travel Industry Dictionary [home, info]
29. fortress: Legal dictionary [home, info]

Computing (1 matching dictionary)

30. fortress: Encyclopedia [home, info]

Medicine (1 matching dictionary)

31. fortress: Medical dictionary [home, info]

Miscellaneous (2 matching dictionaries)

32. fortress: Encyclopedia of Graphic Symbols [home, info]
33. Fortress: Brilliant Dream Dictionary [home, info]

Slang (1 matching dictionary)

34. Fortress: Urban Dictionary [home, info]

Sports (1 matching dictionary)

35. Fortress: Chess Dictionary [home, info]

Tech (1 matching dictionary)

36. Fortress: Dictionary of Military Architecture [home, info]

(Note: See fortresss for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (fortress) ▸ noun:  a fortified defensive structure ▸ Also see fortresss ▸ Word origin ▸ Words similar to fortress ▸ Usage examples for fortress ▸ Idioms related to fortress (New!) ▸ Popular adjectives describing fortress ▸ Words that often appear near fortress ▸ Rhymes of fortress ▸ Invented words related to fortress