DEFINITIONS
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ascertain

[ as-er-teyn ]
/ ˌæs ərˈteɪn /
SEE SYNONYMS FOR ascertain ON THESAURUS.COM

verb (used with object)

to find out definitely; learn with certainty or assurance; determine: to ascertain the facts.
Archaic. to make certain, clear, or definitely known.

Words related to ascertain

observable, discernible, noticeable, perceptible, definite, measurable, marked, sizable, substantial, significant, detectable, verifiable, undeniable, unmistakable, obvious, irrefutable, conclusive, apparent, clear-cut, estimable

Words nearby ascertain

ascension day, ascensionist, ascensiontide, ascensive, ascent, ascertain, ascesis, ascetic, asceticism, asch, aschaffenburg

Origin of ascertain

1400–50; late Middle English, variant of assertain, acertain < Middle French acertain- (tonic stem of acertener to make certain), equivalent to a- a-5 + certain certain

OTHER WORDS FROM ascertain

synonym study for ascertain

1. See learn.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Examples from the Web for ascertainable

British Dictionary definitions for ascertainable

ascertain
/ (ˌæsəˈteɪn) /

verb (tr)

to determine or discover definitely
archaic to make certain

Derived forms of ascertain

ascertainable, adjectiveascertainably, adverbascertainment, noun

Word Origin for ascertain

C15: from Old French acertener to make certain
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012