Meaning of “uncertain” - Learner’s Dictionary

uncertain

adjective uk us /ʌnˈsɜːtən/
SOMEONE

B2 not sure or not able to decide about something:

Bridie was uncertain about meeting him.
SITUATION

B2 not known, or not completely certain:

The museum faces an uncertain future.
uncertainly adverb
uncertainty noun [ C, U ]

(Definition of “uncertain” from the Cambridge Learner’s Dictionary © Cambridge University Press)