not definitely ascertainable or fixed, as in time of occurrence, number, dimensions, or quality.
not confident, assured, or free from hesitancy: an uncertain smile.
not clearly or precisely determined; indefinite; unknown: a manuscript of uncertain origin.
vague; indistinct; not perfectly apprehended: an abstruse novel with uncertain themes.
subject to change; variable; capricious; unstable: a person of uncertain opinions.
ambiguous; unreliable; undependable: Her loyalties are uncertain.
dependent on chance or unpredictable factors; doubtful; of unforeseeable outcome or effect.
unsteady or flickering, as light; of changing intensity or quality.
Origin of uncertain
Middle English word dating back to 1250–1300; see origin at un-1, certain
SYNONYMS FOR uncertain
1 unsure, unpredictable.
3 unsettled, undetermined.
8 irregular.
SEE SYNONYMS FOR uncertain ON THESAURUS.COM
synonym study for uncertain
1. Uncertain,insecure,precarious imply a lack of predictability. That which is uncertain is doubtful or problematical; it often involves danger through an inability to predict or to place confidence in the unknown: The time of his arrival is uncertain. That which is insecure is not firm, stable, reliable, or safe, and hence is likely to give way, fail, or be overcome: an insecure foundation, footing, protection.Precarious suggests great susceptibility to failure, or exposure to imminent danger: a precarious means of existence.
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