- to find out definitely; learn with certainty or assurance; determine: to ascertain the facts.
- Archaic. to make certain, clear, or definitely known.
Origin of ascertain
Examples from the Web for ascertained
"This is hours old and the full facts are still to be ascertained as those involved are debriefed," officials said.Day 2: Breaking News About Osama bin Laden's Death
The Daily Beast
May 3, 2011
If any exist they ought to be ascertained and guarded against.
This remained to be ascertained in exploring that river upwards.
I think I have a clue by which his address may be ascertained.Life in London
Of my father, I knew nothing; I have since ascertained he must then have been dead.Ned Myers
James Fenimore Cooper
The precise occasion of this offence cannot, and need not, be ascertained.Female Scripture Biographies, Vol. I
Francis Augustus Cox
- to determine or discover definitely
- archaic to make certain
Word Origin and History for ascertained
early 15c., "to inform, to give assurance," from Anglo-French acerteiner, Old French acertener "to assure, certify" (13c.), from a "to" (see ad-) + certain "certain" (see certain). Modern meaning of "find out for sure by experiment or investigation" is first attested 1794. Related: Ascertained; ascertaining.