uncertain.
Not certain; unsure.
Meaning & usage
Not certain; unsure.
Not known for certain; questionable.
Tomorrow's weather is uncertain.
Not yet determined; undecided.
Variable and subject to change.
Fitful or unsteady.
Unpredictable or capricious.
Where this word comes from
From Middle English uncerteyn. By surface analysis, un- + certain.
Something uncertain; everything uncertain.
Their approach to the uncertain is laudable: they at least want to know the upper and lower bounds for what the answer could turn out to be.
Where this word comes from
From Middle English uncerteyn. By surface analysis, un- + certain.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.