"This is hours old and the full facts are still to be ascertained as those involved are debriefed," officials said.
He had ascertained, beyond all question, that it emptied its flood into the Gulf of Mexico.
This remained to be ascertained in exploring that river upwards.
The sensation produced in the country has not yet been ascertained, but it is sure to be immense.
The precise occasion of this offence cannot, and need not, be ascertained.
The volume of flow can be ascertained from the depth in the gauging chamber.
From all who are about me, you are certain (I have ascertained it) of a generous welcome.
Sheriff Cook flatly refused to hand it over until it was ascertained whether it justly belonged to Foulk.
The truth, as in most questions of history, remains for ever in the balance, and cannot be ascertained.
Has then the actual history of the World's Creation been ascertained from some other independent and infallible source?
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.