We found 35 dictionaries that define the word ensure:

General (25 matching dictionaries)

1. ensure: Merriam-Webster.com
2. ensure: Oxford Learner's Dictionaries
3. ensure: American Heritage Dictionary of the English Language
4. ensure: Collins English Dictionary
5. ensure: Vocabulary.com
6. Ensure, ensure: Wordnik
7. ensure: Cambridge Advanced Learner's Dictionary
8. ensure: Wiktionary
9. ensure: Webster's New World College Dictionary, 4th Ed.
10. ensure: The Wordsmyth English Dictionary-Thesaurus
11. ensure: Infoplease Dictionary
12. Ensure, ensure: Dictionary.com
13. ensure: Online Etymology Dictionary
14. ensure: Cambridge Essential American English Dictionary
15. Ensure: Wikipedia, the Free Encyclopedia
16. Ensure: Online Plain Text English Dictionary
17. ensure: Webster's Revised Unabridged, 1913 Edition
18. ensure: Rhymezone
19. ensure: AllWords.com Multi-Lingual Dictionary
20. ensure: Webster's 1828 Dictionary
21. ensure: Free Dictionary
22. ensure: Mnemonic Dictionary
23. ensure: Dictionary/thesaurus

Business (3 matching dictionaries)

24. MoneyGlossary.com (No longer online)
25. INVESTORWORDS (No longer online)
26. ensure: Legal dictionary

Computing (1 matching dictionary)

27. ensure: Encyclopedia

Medicine (2 matching dictionaries)

28. ensure: Sound Alike Words
29. Ensure: Medical dictionary

Miscellaneous (2 matching dictionaries)

30. Sound-Alike Words (No longer online)
31. ENSURE: Acronym Finder

Slang (1 matching dictionary)

32. ensure: Urban Dictionary

Tech (1 matching dictionary)

33. ensure: Webster's New World Telecom Dictionary

(Note: See ensured as well.)

Definitions from Wiktionary ( ) ▸ verb:  (transitive) To make a pledge to (someone); to promise, guarantee (someone of something); to assure. ▸ verb:  (intransitive) To make sure or certain of something (usually some future event or condition). Similar: assure, guarantee, insure, see to it, ascertain, secure, control, see, check, safeguard, more... Opposite: endanger, jeopardize, risk, compromise, threaten Types: Advance, Enlive, Boost, Sustacal, Viactiv, Geritol, Myoplex, PediaSure, more... Phrases: to ensure, ensure success, ensure that, help ensure, ensure reliability, more... Colors:     blue,     green,     white,     teal,     turquoise, more... ▸ Word origin ▸ Words similar to ensure ▸ Usage examples for ensure ▸ Idioms related to ensure ▸ Wikipedia articles (New!) ▸ Words that often appear near ensure ▸ Rhymes of ensure ▸ Invented words related to ensure