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We found 40 dictionaries with English definitions that include the word sure:
Click on the first link on a line below to go directly to a page where "sure" is defined.

General (32 matching dictionaries)

1. sure: Merriam-Webster.com [home, info]
2. sure: Oxford Learner's Dictionaries [home, info]
3. sure: American Heritage Dictionary of the English Language [home, info]
4. sure: Collins English Dictionary [home, info]
5. sure: Vocabulary.com [home, info]
6. sure, sure: Macmillan Dictionary [home, info]
7. Sure, sure, sure: Wordnik [home, info]
8. sure: Cambridge Advanced Learner's Dictionary [home, info]
9. sure: Wiktionary [home, info]
10. sure: Webster's New World College Dictionary, 4th Ed. [home, info]
11. sure: The Wordsmyth English Dictionary-Thesaurus [home, info]
12. sure: Infoplease Dictionary [home, info]
13. sure: Dictionary.com [home, info]
14. sure: Online Etymology Dictionary [home, info]
15. sure: UltraLingua English Dictionary [home, info]
16. sure: Cambridge Dictionary of American English [home, info]
17. sure: Cambridge International Dictionary of Idioms [home, info]
18. SURE, SuRe, Sure(Debbie Gibson song), Sure (Cable & Wireless), Sure (Cable and Wireless), Sure (Debbie Gibson song), Sure (Every Little Thing album), Sure (Every Little Thing single), Sure (Every Little Thing song), Sure (Take That song), Sure (brand), Sure (company), Sure (disambiguation), Sure: Wikipedia, the Free Encyclopedia [home, info]
19. Sure: Online Plain Text English Dictionary [home, info]
20. sure: Webster's Revised Unabridged, 1913 Edition [home, info]
21. sure: Rhymezone [home, info]
22. sure: AllWords.com Multi-Lingual Dictionary [home, info]
23. sure: Webster's 1828 Dictionary [home, info]
24. sure: Free Dictionary [home, info]
25. sure: Mnemonic Dictionary [home, info]
26. sure: WordNet 1.7 Vocabulary Helper [home, info]
27. sure: LookWAYup Translating Dictionary/Thesaurus [home, info]
28. sure: Dictionary/thesaurus [home, info]
29. sure: Wikimedia Commons US English Pronunciations [home, info]
30. Sure (f): AllWords.com Multi-Lingual Dictionary [home, info]

Business (2 matching dictionaries)

31. SURE: Glossary of research economics [home, info]
32. sure: Legal dictionary [home, info]

Computing (2 matching dictionaries)

33. Sure: Free On-line Dictionary of Computing [home, info]
34. Sure: Encyclopedia [home, info]

Medicine (1 matching dictionary)

35. Sure: online medical dictionary [home, info]

Miscellaneous (3 matching dictionaries)

36. SURE: Acronym Finder [home, info]
37. SURE: AbbreviationZ [home, info]
38. sure: Idioms [home, info]

(Note: See surest for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (sure) ▸ adjective:  physically secure or dependable ("A sure footing") ▸ adjective:  certain not to fail ("A sure hand on the throttle") ▸ adjective:  infallible or unfailing ("A sure (or true) sign of one's commitment") ▸ adjective:  (of persons) worthy of trust or confidence ("A sure (or trusted) friend") ▸ adjective:  exercising or taking care great enough to bring assurance ("Be sure to lock the doors") ▸ adjective:  impossible to doubt or dispute ("Indisputable (or sure) proof") ▸ adjective:  having or feeling no doubt or uncertainty; confident and assured ("Was sure (or certain) she had seen it") ▸ adjective:  certain to occur; destined or inevitable ("Sudden but sure regret") ▸ adjective:  capable of being depended on ("A sure way to distinguish the two") ▸ adverb:  definitely or positively (`sure' is sometimes used informally for `surely') ("The results are surely encouraging") ▸ Also see surest ▸ Word origin ▸ Words similar to sure ▸ Usage examples for sure ▸ Idioms related to sure (New!) ▸ Popular nouns described by sure ▸ Words that often appear near sure ▸ Rhymes of sure ▸ Invented words related to sure