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Definition of: ascertain
(as′ər·tān′) v.t.
1. To learn with certainty about; find out.
2. Obs. To make certain; determine; define. See synonyms under DISCOVER, KNOW. [<OF acertener <a- to (<L ad-) + certain. See CERTAIN.]
—as′cer·tain′·a·ble adjective
—as′cer·tain′a·ble·ness noun
—as′·cer·tain′a·bly adverb
—as′cer·tain′ment noun
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