When you have uncertainty, that means you're not really sure. If you missed a lot of classes and didn't study much, you may have uncertainty about whether you passed your big math test.

The noun uncertainty describes a state of doubt. You might view with uncertainty a claim that a $100 investment will return $500 by next month. Uncertainty can also involve being dependent on chance. Your uncle might have uncertainty that he'll have a job next year because his company might be closing one of its branch offices.

Definitions of uncertainty

n the state of being unsure of something

doubt, doubtfulness, dubiety, dubiousness, incertitude
the state of being certain
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arriere pensee, mental reservation, reservation
an unstated doubt that prevents you from accepting something wholeheartedly
distrust, misgiving, mistrust, suspicion
doubt about someone's honesty
disbelief, incredulity, mental rejection, skepticism
doubt about the truth of something
indecision, indecisiveness, irresolution
doubt concerning two or more possible alternatives or courses of action
doubt or uncertainty as to whether something is the case
an uncertain cognitive state
hesitation, vacillation, wavering
indecision in speech or action
Type of:
cognitive state, state of mind
the state of a person's cognitive processes

n being unsettled or in doubt or dependent on chance

“the uncertainty of the outcome”
precariousness, uncertainness
certainty, foregone conclusion, sure thing
something that is certain
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doubt, doubtfulness, dubiousness, question
uncertainty about the truth or factuality or existence of something
indefiniteness, indefinity, indeterminacy, indeterminateness, indetermination
the quality of being vague and poorly defined
lacking predictability
improbability, improbableness
the quality of being improbable
the quality of happening accidentally and by lucky chance
the quality of being a conclusion or opinion based on supposition and conjecture rather than on fact or investigation
the quality of being inconclusive
unlikelihood, unlikeliness
the improbability of a specified outcome
Type of:
an essential and distinguishing attribute of something or someone

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