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 two are uncertain about each other from the start.
—
Jackson McHenry, Vulture, 31 Oct. 2025
Panda, the Carnegie Endowment expert, said that South Korea likely sees value in nuclear latency due to an increasingly uncertain relationship with the United States.
—Davis Winkie, USA Today, 30 Oct. 2025
Democrat Abigail Spanberger is favored to win Virginia’s gubernatorial race, but the scale of her potential victory remains uncertain.
—Martha McHardy, MSNBC Newsweek, 30 Oct. 2025
The contestants’ ambivalence is surely relatable to the many people who feel uncertain about how to balance clashing desires.
—Julie Beck, The Atlantic, 30 Oct. 2025
See All Example Sentences for uncertain
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Jackson McHenry, Vulture, 31 Oct. 2025
Panda, the Carnegie Endowment expert, said that South Korea likely sees value in nuclear latency due to an increasingly uncertain relationship with the United States.
—Davis Winkie, USA Today, 30 Oct. 2025
Democrat Abigail Spanberger is favored to win Virginia’s gubernatorial race, but the scale of her potential victory remains uncertain.
—Martha McHardy, MSNBC Newsweek, 30 Oct. 2025
The contestants’ ambivalence is surely relatable to the many people who feel uncertain about how to balance clashing desires.
—Julie Beck, The Atlantic, 30 Oct. 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 4 Nov. 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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