- 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 ascertaining
It is the constitutional method of ascertaining the public will.
His first object at once became the ascertaining of his bearings.The Law-Breakers
And there was no other means of ascertaining what had been going on.
I had no trouble in ascertaining that Jake had nothing to do with things.
"There are other ways of ascertaining that without stooping to keyholes," said her husband.The Snare
- to determine or discover definitely
- archaic to make certain
Word Origin and History for ascertaining
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.