Definition of uncertain
- his success was uncertain
- an uncertain ally
- an uncertain claim
- remains uncertain about her plans
- a fire of uncertain origin
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.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'uncertain.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
: not exactly known or decided : not definite or fixed
: not sure : having some doubt about something
: not definitely known
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