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
The future is uncertain for Kodai Senga.
—
Peter Sblendorio, New York Daily News, 27 Apr. 2026
Where things go from here with Texas Tech is uncertain.
—Trey Wallace Outkick, FOXNews.com, 27 Apr. 2026
In his assessment, this shift can enable more disciplined spending and stronger outcomes, particularly in uncertain market conditions.
—William Jones, USA Today, 27 Apr. 2026
Griffin’s chief operating officer, Gerald Beeson, suggested in no uncertain terms that the mayor had put at risk a planned Citadel redevelopment of 350 Park Ave.
—The Editorial Board, Chicago Tribune, 26 Apr. 2026
See All Example Sentences for uncertain
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Peter Sblendorio, New York Daily News, 27 Apr. 2026
Where things go from here with Texas Tech is uncertain.
—Trey Wallace Outkick, FOXNews.com, 27 Apr. 2026
In his assessment, this shift can enable more disciplined spending and stronger outcomes, particularly in uncertain market conditions.
—William Jones, USA Today, 27 Apr. 2026
Griffin’s chief operating officer, Gerald Beeson, suggested in no uncertain terms that the mayor had put at risk a planned Citadel redevelopment of 350 Park Ave.
—The Editorial Board, Chicago Tribune, 26 Apr. 2026
See All Example Sentences for uncertain
Cite this Entry
“Uncertain.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/uncertain. Accessed 28 Apr. 2026.
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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