uncertain
adjective
un·cer·tain
ˌən-ˈsər-tᵊn 
1
3
: indefinite, indeterminate
the time of departure is uncertain
4
: not certain to occur : problematical
his success was uncertain
5
: not reliable : untrustworthy
an uncertain ally
uncertainly
adverb
Examples of uncertain in a Sentence
The time of departure is still uncertain.
We are still uncertain of the truth.
She remains uncertain about her plans.
I'm uncertain about how to respond.
The cause of the fire is uncertain.
He has an uncertain temper.
They face a financially uncertain future.
Recent Examples on the Web
Culture provides a grip in an uncertain world, whether racing through growth or crisis mode.
—
Umang Modi, Forbes.com, 7 July 2025
The future is uncertain for both the league and its players.
—Julia Poe, Chicago Tribune, 7 July 2025
This enormous — and uncertain — data center growth should not be Maryland’s responsibility.
—David S. Lapp, Baltimore Sun, 7 July 2025
According to a survey conducted for the American Institute of Certified Public Accountants, more than 70% of Americans have felt either cautious or uncertain about their financial situation over the past 12 months.
—Corina Vanek, AZCentral.com, 7 July 2025
See All Example Sentences for uncertain
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Umang Modi, Forbes.com, 7 July 2025
The future is uncertain for both the league and its players.
—Julia Poe, Chicago Tribune, 7 July 2025
This enormous — and uncertain — data center growth should not be Maryland’s responsibility.
—David S. Lapp, Baltimore Sun, 7 July 2025
According to a survey conducted for the American Institute of Certified Public Accountants, more than 70% of Americans have felt either cautious or uncertain about their financial situation over the past 12 months.
—Corina Vanek, AZCentral.com, 7 July 2025
See All Example Sentences for uncertain
Cite this Entry
“Uncertain.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/uncertain. Accessed 18 Jul. 2025.
Copy CitationKids Definition
uncertain
adjective
un·cer·tain
ˌən-ˈsərt-ᵊn
ˈən-
1
: not definite or fixed
an uncertain quantity
2
a
: not sure
uncertain of the truth
b
: not known for sure
an uncertain claim
3
: likely to change : not dependable
uncertain weather
uncertainly
adverb
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