Uncertain meaning

What does “uncertain” mean? Definitions, examples, synonyms and opposites.

“uncertain” is an adjective with 7 meanings. Its most common meaning is: lacking or indicating lack of confidence or assurance.

uncertain

lacking or indicating lack of confidence or assurance
“uncertain of his convictions”
“unsure of himself and his future”
Synonymsunsure incertain
Oppositescertain
not established beyond doubt; still undecided or unknown
“an uncertain future”
“a manuscript of uncertain origin”
Oppositescertain
not established or confirmed
“his doom is as yet unsealed”
Synonymsunsealed
not certain to occur; not inevitable
“everything is uncertain about the army”
“the issue is uncertain”
Oppositescertain
subject to change
“a changeable climate”
“the weather is uncertain”
Synonymschangeable unsettled
not consistent or dependable
“an uncertain recollection of events”
“a gun with a rather uncertain trigger”
ambiguous (especially in the negative)
“she spoke in no uncertain terms”

Source: WordNet 3.1, Princeton University