1. (

• uncertain ,
• unsure ,
• incertain

) 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. (

• uncertain ,

) 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. (

• unsealed ,
• uncertain ,

) not established or confirmed; "his doom is as yet unsealed" ;

4. (

• uncertain ,

) not certain to occur; not inevitable; "everything is uncertain about the army"; "the issue is uncertain" ;

5. (

• changeable ,
• uncertain ,
• unsettled

) 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. (

• uncertain

) not consistent or dependable; "an uncertain recollection of events"; "a gun with a rather uncertain trigger" ;

7. (

• uncertain

) ambiguous (especially in the negative); "she spoke in no uncertain terms" ;