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.
Enrollment in the Affordable Care Act continues to erode as some customers struggle to make premium payments, with the declining numbers churning market uncertainty for insurers. Julie Appleby, CBS News, 19 May 2026 The results underscore how legacy pizza chains continue to resonate with consumers, even as restaurant habits evolve and diners increasingly seek value, convenience and familiarity amid higher food costs and economic uncertainty. Peter Burke, FOXNews.com, 19 May 2026 Even as Gen Z faces a labor market mired in uncertainty, receiving mixed signals about how AI will reshape the future of work, Upwork President and CEO Hayden Brown is not doom-and-gloom. Jacqueline Munis, Fortune, 19 May 2026 What replaces these plans is unclear and has plunged public land managers, local communities and even industry into uncertainty that will linger for years. Scott Braden, Denver Post, 19 May 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

Browse Nearby Words

Cite this Entry

“Uncertainty.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/uncertainty. Accessed 21 May. 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

More from Merriam-Webster on uncertainty

Love words? Need even more definitions?

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

More from Merriam-Webster