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.
Trump's tariffs in particular have injected broad uncertainty into the economy, with some businesses already passing those additional costs to consumers, who have been rushing to buy big-ticket items in anticipation of higher prices, according to JPMorgan analysts. Trevor Hughes, USA Today, 28 Apr. 2025 Voters have been growing discontented with the president’s policies as his sweeping tariffs have fueled chaos and uncertainty in the volatile global economy. Callie Patteson, The Washington Examiner, 27 Apr. 2025 The weather service said there is some uncertainty regarding when and where the storms might develop. Robert A. Cronkleton, Kansas City Star, 26 Apr. 2025 Connecticut veterans expressed fear and uncertainty this week about possible threats to health care access in the face of federal changes at the Department of Veterans Affairs. Katy Golvala, Hartford Courant, 26 Apr. 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

Browse Nearby Words

Cite this Entry

“Uncertainty.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/uncertainty. Accessed 30 Apr. 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

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!