uncertainty

noun

un·​cer·​tain·​ty ˌən-ˈsər-tᵊn-tē How to pronounce uncertainty (audio)
Synonyms of uncertaintynext
1
: the quality or state of being uncertain : doubt
2
: something that is uncertain
Choose the Right Synonym for uncertainty

uncertainty, doubt, dubiety, skepticism, suspicion, mistrust mean lack of sureness about someone or something.

uncertainty may range from a falling short of certainty to an almost complete lack of conviction or knowledge especially about an outcome or result.

assumed the role of manager without hesitation or uncertainty

doubt suggests both uncertainty and inability to make a decision.

plagued by doubts as to what to do

dubiety stresses a wavering between conclusions.

felt some dubiety about its practicality

skepticism implies unwillingness to believe without conclusive evidence.

an economic forecast greeted with skepticism

suspicion stresses lack of faith in the truth, reality, fairness, or reliability of something or someone.

regarded the stranger with suspicion

mistrust implies a genuine doubt based upon suspicion.

had a great mistrust of doctors

Examples of uncertainty in a Sentence

There is some uncertainty about the company's future. He accepted the position without hesitation or uncertainty.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
For many, volunteering has become a way to cope with the uncertainty and grief. Ivan Taylor, CBS News, 30 June 2026 Clint says that the easy ones have growth stories — with annual recurring revenue, strong consensus, social proof — while the best opportunities often have uncertainty, complexity, disagreement, temporary problems and incomplete information. Neil Senturia, San Diego Union-Tribune, 29 June 2026 American wine has never enjoyed greater global credibility, but the industry faces historic crossroads today, grappling with oversupply, declining consumption and growing uncertainty about its future. Anna Lee Iijima, Chicago Tribune, 29 June 2026 These agreements clarify financial arrangements post-divorce, ensuring professional independence and reducing uncertainty, as exemplified by David Geffen's divorce. Morgan Mouchette, Forbes.com, 29 June 2026 See All Example Sentences for uncertainty

Word History

First Known Use

14th century, in the meaning defined at sense 1

Time Traveler
The first known use of uncertainty was in the 14th century

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Cite this Entry

“Uncertainty.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/uncertainty. Accessed 5 Jul. 2026.

Kids Definition

uncertainty

noun
un·​cer·​tain·​ty ˌən-ˈsərt-ᵊn-tē How to pronounce uncertainty (audio)
1
: lack of certainty
2
: something that is uncertain

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