uncertain Definition

uncertain
adj

1. Not sure, certain or confident.

Thesaurus: ambivalent, ambiguous, vague, indefinite, irresolute, undecided; unpredictable, changeable, precarious, vacillating, unsettled, variable, unsure.
2. Not definitely known or decided.
3. Not to be depended upon.
4. Likely to change.
5. Lacking confidence; hesitant.

Form: uncertain of something (often)

Derivative: uncertainly
adverb

Derivative: uncertainty

The state or condition of being uncertain.
Thesaurus: doubt, indecision, misgiving, skepticism, dubiety, inconclusiveness, diffidence, hesitation, confusion, ambiguity, indeterminacy, vagueness, fuzziness, unpredictability, chanciness.

Something that is uncertain.

Idiom: in no uncertain terms

Unambiguously.

Strongly; emphatically.

Etymology: 14c.