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

General (32 matching dictionaries)

1. ascertain: Merriam-Webster.com [home, info]
2. ascertain: Oxford Dictionaries [home, info]
3. ascertain: American Heritage Dictionary of the English Language [home, info]
4. ascertain: Collins English Dictionary [home, info]
5. ascertain: Vocabulary.com [home, info]
6. ascertain: Macmillan Dictionary [home, info]
7. Ascertain, ascertain: Wordnik [home, info]
8. ascertain: Cambridge Advanced Learner's Dictionary [home, info]
9. ascertain: Wiktionary [home, info]
10. ascertain: Webster's New World College Dictionary, 4th Ed. [home, info]
11. ascertain: V2 Vocabulary Building Dictionary [home, info]
12. ascertain: The Wordsmyth English Dictionary-Thesaurus [home, info]
13. ascertain: Infoplease Dictionary [home, info]
14. Ascertain, ascertain: Dictionary.com [home, info]
15. ascertain: Online Etymology Dictionary [home, info]
16. ascertain: UltraLingua English Dictionary [home, info]
17. ascertain: Cambridge Dictionary of American English [home, info]
18. Ascertain: Online Plain Text English Dictionary [home, info]
19. ascertain: Webster's Revised Unabridged, 1913 Edition [home, info]
20. ascertain: Rhymezone [home, info]
21. ascertain: AllWords.com Multi-Lingual Dictionary [home, info]
22. ascertain: Webster's 1828 Dictionary [home, info]
23. ascertain: Hutchinson's Dictionary of Difficult Words [home, info]
24. ascertain: Free Dictionary [home, info]
25. ascertain: Hutchinson Dictionaries [home, info]
26. ascertain: Mnemonic Dictionary [home, info]
27. ascertain: WordNet 1.7 Vocabulary Helper [home, info]
28. ascertain: LookWAYup Translating Dictionary/Thesaurus [home, info]
29. ascertain: Dictionary/thesaurus [home, info]
30. ascertain: Wikimedia Commons US English Pronunciations [home, info]

Art (1 matching dictionary)

31. ascertain: The Organon: A Conceptually Indexed Dictionary (by Genus and Differentia) [home, info]

Business (2 matching dictionaries)

32. ascertain: Legal dictionary [home, info]
33. ascertain: BusinessDictionary.com [home, info]

Computing (1 matching dictionary)

34. ascertain: Encyclopedia [home, info]

Medicine (1 matching dictionary)

35. ascertain: Medical dictionary [home, info]

Miscellaneous (1 matching dictionary)

36. ascertain: Idioms [home, info]

(Note: See ascertains for more definitions.)

Quick definitions from Macmillan ( ) Provided by Quick definitions from WordNet (ascertain) ▸ verb:  learn or discover with certainty ▸ verb:  after a calculation, investigation, experiment, survey, or study ▸ verb:  find out, learn, or determine with certainty, usually by making an inquiry or other effort ▸ verb:  be careful or certain to do something; make certain of something ▸ Also see ascertains ▸ Word origin ▸ Words similar to ascertain ▸ Usage examples for ascertain ▸ Words that often appear near ascertain ▸ Rhymes of ascertain ▸ Invented words related to ascertain