certainty
noun
cer·tain·ty
ˈsər-tᵊn-tē 
plural certainties
1
: something that is certain
2
: the quality or state of being certain especially on the basis of evidence
Examples of certainty in a Sentence
Scientists still do not know with any degree of certainty why the disease spread so quickly.
We cannot predict the outcome with absolute certainty.
There was no certainty that the package would arrive in time.
Her certainty about these complex moral issues is surprising.
Recent Examples on the Web
And who doesn't, once in a while, need to be freed from the tyranny of certainty?
—
Stephanie Zacharek, Time, 19 Sep. 2025
This would move us from probabilistic trust to mathematical certainty, transforming cryptographic assurance into a provable, unassailable fact.
—Pravir Malik, Forbes.com, 19 Sep. 2025
The administration favours negotiating flexibility over certainty, costing small-business survival.
—Jacob Bennett, Fortune, 18 Sep. 2025
Amid lingering questions are two certainties.
—Nicole Fallert, USA Today, 15 Sep. 2025
See All Example Sentences for certainty
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Stephanie Zacharek, Time, 19 Sep. 2025
This would move us from probabilistic trust to mathematical certainty, transforming cryptographic assurance into a provable, unassailable fact.
—Pravir Malik, Forbes.com, 19 Sep. 2025
The administration favours negotiating flexibility over certainty, costing small-business survival.
—Jacob Bennett, Fortune, 18 Sep. 2025
Amid lingering questions are two certainties.
—Nicole Fallert, USA Today, 15 Sep. 2025
See All Example Sentences for certainty
Cite this Entry
“Certainty.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/certainty. Accessed 22 Sep. 2025.
Copy CitationKids Definition
certainty
noun
cer·tain·ty
ˈsərt-ᵊn-tē
plural certainties
1
: something certain
2
: the quality or state of being or feeling certain
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