Definition for

uncertain


To make or cause to be uncertain.

Not certain; doubtful.

Not known as regards quantity or extent; indefinite; problematical: as, an uncertain number of independent voters; a person of uncertain age.

Having doubts; without certain knowledge; not sure.

Not sure as to aim or effect desired.

Unreliable; insecure; not to be depended on.

Not firm or fixed; vague; indeterminate in nature; fluctuating.

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