UNCERTAIN definition: not definitely ascertainable or fixed, as in time of occurrence, number, dimensions, or quality. See examples of uncertain used in a sentence.

UNCERTAIN definition: 1. not knowing what to do or believe, or not able to decide about something: 2. not known or…. Learn more.

Synonyms for UNCERTAIN: volatile, unpredictable, changeful, unstable, inconsistent, variable, unsettled, capricious; Antonyms of UNCERTAIN: certain, constant, stable, predictable, steady, …

Define uncertain. uncertain synonyms, uncertain pronunciation, uncertain translation, English dictionary definition of uncertain. adj. 1. Not known or established; questionable: domestic …

If you are uncertain about something, you do not know what you should do, what is going to happen, or what the truth is about something.

Definition of uncertain adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

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.

Dec 6, 2025 · Not known for certain; questionable. Tomorrow's weather is uncertain. Not yet determined; undecided. Variable and subject to change.

uncertain definition: not sure or confident about something. Check meanings, examples, usage tips, pronunciation, domains, and related words. Discover expressions like "uncertain footing", …

We are still uncertain of the truth. She remains uncertain about her plans. I'm uncertain about how to respond.