Usually means: Determine the truth or certainty.
Definitions [Related words] [Mentions] [Lyrics] [History]
We found 32 dictionaries that define the word ascertain:

General (26 matching dictionaries)
  1. ascertain: Merriam-Webster.com
  2. ascertain: Oxford Learner's Dictionaries
  3. ascertain: American Heritage Dictionary of the English Language
  4. ascertain: Collins English Dictionary
  5. ascertain: Vocabulary.com
  6. Ascertain, ascertain: Wordnik
  7. ascertain: Cambridge Advanced Learner's Dictionary
  8. ascertain: Wiktionary
  9. ascertain: Webster's New World College Dictionary, 4th Ed.
  10. ascertain: The Wordsmyth English Dictionary-Thesaurus
  11. ascertain: Infoplease Dictionary
  12. Ascertain, ascertain: Dictionary.com
  13. ascertain: Online Etymology Dictionary
  14. ascertain: Cambridge Essential American English Dictionary
  15. Ascertain: Online Plain Text English Dictionary
  16. ascertain: Webster's Revised Unabridged, 1913 Edition
  17. ascertain: Rhymezone
  18. ascertain: AllWords.com Multi-Lingual Dictionary
  19. ascertain: Webster's 1828 Dictionary
  20. ascertain: Free Dictionary
  21. ascertain: Mnemonic Dictionary
  22. ascertain: LookWAYup Translating Dictionary/Thesaurus
  23. ascertain: Dictionary/thesaurus
  24. ascertain: Wikimedia Commons US English Pronunciations

Art (1 matching dictionary)
  1. The Organon: A Conceptually Indexed Dictionary (by Genus and Differentia) (No longer online)

Business (2 matching dictionaries)
  1. ascertain: Legal dictionary
  2. BusinessDictionary.com (No longer online)

Computing (1 matching dictionary)
  1. ascertain: Encyclopedia

Medicine (1 matching dictionary)
  1. ascertain: Medical dictionary

Miscellaneous (1 matching dictionary)
  1. ascertain: Idioms

(Note: See ascertainable as well.)

Definitions from Wiktionary (
)
American English Definition British English Definition
verb:  To find out definitely; to discover or establish.
verb:  (obsolete) To make (someone) certain or confident about something; to inform.
verb:  (archaic) To establish, to prove.
verb:  (archaic) To ensure or effect.

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