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Definitions of ascertain

  1. To render (a person) certain; to cause to feel certain; to make confident; to assure; to apprise. Webster Dictionary DB
  2. To make (a thing) certain to the mind; to free from obscurity, doubt, or change; to make sure of; to fix; to determine. Webster Dictionary DB
  3. To find out or learn for a certainty, by trial, examination, or experiment; to get to know; as, to ascertain the weight of a commodity, or the purity of a metal. Webster Dictionary DB
  4. To make certain; to find out; to determine definitely by test or examination. The Winston Simplified Dictionary. By William Dodge Lewis, Edgar Arthur Singer. Published 1919.
  5. To determine: to obtain certain knowledge of. The american dictionary of the english language. By Daniel Lyons. Published 1899.
  6. To acquire certain knowledge of; to learn. The Clarendon dictionary. By William Hand Browne, Samuel Stehman Haldeman. Published 1894.
  7. find out, learn, or determine with certainty, usually by making an inquiry or other effort; "I want to see whether she speaks French"; "See whether it works"; "find out if he speaks Russian"; "Check whether the train leaves on time" Scrapingweb Dictionary DB
  8. after a calculation, investigation, experiment, survey, or study; "find the product of two numbers"; "The physicist who found the elusive particle won the Nobel Prize" Scrapingweb Dictionary DB
  9. To make certain; to determine; to find out accurately; to establish. Nuttall's Standard dictionary of the English language. By Nuttall, P.Austin. Published 1914.
  10. To make sure by examination; to establish. Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
  11. ASCERTAINABLE. The Concise Standard Dictionary of the English Language. By James Champlin Fernald. Published 1919.

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Usage examples for ascertain

  1. A king was informed that all the men in his State were obeying their wives; so he ordered them all before him on a certain day and spoke to them, saying he had heard the fact about their obeying their wives, and he wished to ascertain if it was so. – An Onlooker in France 1917-1919 by William Orpen
  2. I can't go about from door to door making inquiries, so if you'll go there and ascertain his address for me, I'll give you five francs for yourself, ' so my money's made. – Baron Trigault's Vengeance Volume 2 (of 2) by Emile Gaboriau
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