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 bill now moves to the Senate, where its future is uncertain.
—
Kelly Phillips Erb, Forbes.com, 13 June 2025
The impact of the decision is uncertain because immigrants could apply for legal status under other programs.
—Bart Jansen, USA Today, 13 June 2025
Whether more Bridget Jones tales will grace the screen is uncertain, but according to Fielding, the character continues to entertain new generations of women.
—Sharareh Drury, People.com, 12 June 2025
Investors have been increasingly uncertain about the long-term outlook for the US debt burden, giving them pause about the risk associated with loaning money to the government over a longer period.
—John Towfighi, CNN Money, 12 June 2025
See All Example Sentences for uncertain
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Kelly Phillips Erb, Forbes.com, 13 June 2025
The impact of the decision is uncertain because immigrants could apply for legal status under other programs.
—Bart Jansen, USA Today, 13 June 2025
Whether more Bridget Jones tales will grace the screen is uncertain, but according to Fielding, the character continues to entertain new generations of women.
—Sharareh Drury, People.com, 12 June 2025
Investors have been increasingly uncertain about the long-term outlook for the US debt burden, giving them pause about the risk associated with loaning money to the government over a longer period.
—John Towfighi, CNN Money, 12 June 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 17 Jun. 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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