As`cer*tain" (#), v. t. [imp. & p. p. Ascertained (#); p. pr. & vb. n. Ascertaining.] [OF. acertener; a (L. ad) + certain. See Certain.]
To render (a person) certain; to cause to feel certain; to make confident; to assure; to apprise.
When the blessed Virgin was so ascertained.
Muncer assured them that the design was approved of by Heaven, and that the Almighty had in a dream ascertained him of its effects.
To make (a thing) certain to the mind; to free from obscurity, doubt, or change; to make sure of; to fix; to determine.
The divine law . . . ascertaineth the truth.
The very deferring [of his execution] shall increase and ascertain the condemnation.
The ministry, in order to ascertain a majority . . . persuaded the queen to create twelve new peers.
The mildness and precision of their laws ascertained the rule and measure of taxation.
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.
He was there only for the purpose of ascertaining whether a descent on England was practicable.
© Webster 1913.