Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • transitive verb To discover with certainty, as through examination or experimentation. synonym: discover.
  • transitive verb Archaic To make certain, definite, and precise.

from The Century Dictionary.

  • To make certain; determine; define or reduce to precision by removing doubt, obscurity, or ambiguity; establish; prove.
  • To find out by trial, examination, or experiment, so as to know as certain; acquire an accurate knowledge of: as, to ascertain the weight of a commodity or the purity of a metal.
  • To make sure of; insure.
  • To make certain or sure; certify; assure; inform.
  • To establish with certainty; render invariable, or not subject to caprice; fix.

from the GNU version of the Collaborative International Dictionary of English.

  • transitive verb obsolete To render (a person) certain; to cause to feel certain; to make confident; to assure; to apprise.
  • transitive verb Archaic To make (a thing) certain to the mind; to free from obscurity, doubt, or change; to make sure of; to fix; to determine.
  • transitive verb To find out or learn for a certainty, by trial, examination, or experiment; to get to know.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • verb To find out definitely; to discover or establish.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • verb find out, learn, or determine with certainty, usually by making an inquiry or other effort
  • verb establish after a calculation, investigation, experiment, survey, or study
  • verb be careful or certain to do something; make certain of something
  • verb learn or discover with certainty

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[Middle English acertainen, to inform, from Old French acertener, ascertain- : a-, to (from Latin ad-; see ad–) + certain, certain; see certain.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

From Old French acertener, from (a- ("to, towards") + certener ("make sure of"), from the adjective certain.

Examples

  • I was able to ascertain from the News forum that there's at least one Telcel shop in Alamos.

    Telcel Sim card.....

  • I was able to ascertain from the News forum that there's at least one Telcel shop in Alamos.

    Telcel Sim card.....

  • I was able to ascertain from the News forum that there's at least one Telcel shop in Alamos.

    Telcel Sim card.....

  • I was able to ascertain from the News forum that there's at least one Telcel shop in Alamos.

    Telcel Sim card.....

  • I was able to ascertain from the News forum that there's at least one Telcel shop in Alamos.

    Telcel Sim card.....

  • I was able to ascertain from the News forum that there's at least one Telcel shop in Alamos.

    Telcel Sim card.....

  • I was able to ascertain from the News forum that there's at least one Telcel shop in Alamos.

    Telcel Sim card.....

  • I was able to ascertain from the News forum that there's at least one Telcel shop in Alamos.

    Telcel Sim card.....

  • I was able to ascertain from the News forum that there's at least one Telcel shop in Alamos.

    Telcel Sim card.....

  • I was able to ascertain from the News forum that there's at least one Telcel shop in Alamos.

    Telcel Sim card.....

Comments

New comments are temporarily disabled while we update our database.

  • People never know how to pronounce this word. ASS SIR TAIN

    December 30, 2006

  • pta lagana, jaan lena

    August 5, 2009

  • my test run

    August 5, 2009

  • "Under the spell of the river, Covenant became slowly more conscious of the reassuring solidity of the Land. It was not an intangible dreamscape; it was concrete, susceptible to ascertainment."

    Lord Foul's Bane

    July 29, 2012