Meaning & Definition of Uncertain in English

1. Lacking or indicating lack of confidence or assurance

• "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"

2. 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"

3. Not established or confirmed

• "His doom is as yet unsealed"

4. Not certain to occur

• Not inevitable

• "Everything is uncertain about the army"

• "The issue is uncertain"

5. Subject to change

• "A changeable climate"

• "The weather is uncertain"

• "Unsettled weather with rain and hail and sunshine coming one right after the other"

6. Not consistent or dependable

• "An uncertain recollection of events"

• "A gun with a rather uncertain trigger"

7. Ambiguous (especially in the negative)

• "She spoke in no uncertain terms"