uncertainty

noun

un·​cer·​tain·​ty ˌən-ˈsər-tᵊn-tē How to pronounce uncertainty (audio)
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.
The deal comes after days of uncertainty on both sides of the aisle over whether the chamber would be able to pass any funding bills before its August recess. Aris Folley, The Hill, 1 Aug. 2025 The looming expiration of the collective bargaining agreement with the players union after the 2026 season creates some uncertainty around whether an All-Star Game would happen if a work stoppage caused regular-season games to be lost. Meghan Montemurro, Chicago Tribune, 1 Aug. 2025 An organization that achieves this can rely on those bonds to help its survival through economic uncertainties and even downturns. Jessica Wong, Forbes.com, 1 Aug. 2025 But there’s always some uncertainty coming off of major surgery like Beck is, having undergone an operation to repair the UCL in his right elbow after sustaining the injury in the SEC Championship Game in December while playing for Georgia. Jordan McPherson, Miami Herald, 1 Aug. 2025 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 Aug. 2025.

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

More from Merriam-Webster on uncertainty

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