1. [ adjective ] lacking or indicating lack of confidence or assurance
Synonyms: incertain unsure

"uncertain of his convictions" "unsure of himself and his future" "moving with uncertain (or unsure) steps" "an uncertain smile" "touched the ornaments with uncertain fingers"

Related terms: certain certain doubtful ambivalent groping assurance certainty
2. [ adjective ] not established beyond doubt; still undecided or unknown

"an uncertain future" "a manuscript of uncertain origin" "plans are still uncertain" "changes of great if uncertain consequences" "without further evidence his story must remain uncertain"

Related terms: certain up_in_the_air indefinite indeterminate certainty
3. [ adjective ] not firm or secure

"balancing three boxes in an uncertain pile"

Related terms: insecure
4. [ adjective ] subject to change
Synonyms: unsettled changeable

"a changeable climate" "the weather is uncertain" "unsettled weather with rain and hail and sunshine coming one right after the other"

Related terms: variable
5. [ adjective ] not consistent or dependable

"an uncertain recollection of events" "a gun with a rather uncertain trigger"

Related terms: unreliable
6. [ adjective ] not certain to occur; not inevitable

"everything is uncertain about the army" "the issue is uncertain"

Related terms: certain chancy contingent up_in_the_air unpredictable
7. [ adjective ] not safe from danger or mishap
Synonyms: unsure

"faced an uncertain future" "an unsure existence"

Related terms: insecure
8. [ adjective ] not established or confirmed
Synonyms: unsealed

"his doom is as yet unsealed"

Related terms: sealed
9. [ adjective ] especially in the negative "no uncertain," as in "spoke in no uncertain terms"
Related terms: ambiguous
Similar spelling:   uncertainty