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

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.

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

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

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

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

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.

Uncertainty or incertitude refers to situations involving imperfect or unknown information. It applies to predictions of future events, to physical measurements that are already made, or to the unknown, …

The meaning of UNCERTAIN is not known beyond doubt : dubious. How to use uncertain in a sentence.

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