Meaning & Definition
adjective
Not certain or confident about something.
She felt unsure about her decision to accept the job offer.
Lacking confidence or assurance.
He was unsure of himself during the presentation.
Having doubts or hesitations.
I'm unsure whether I should go to the party or stay home.
Etymology
Combining 'un-' meaning 'not' with 'sure'.
Common Phrases and Expressions
I am unsure:
expressing doubt about a decision or situation
unsure of oneself:
lacking confidence in one's abilities or decisions
unsure about something:
having doubts regarding a specific matter
Slang Meanings
iffy
The plan seemed a bit iffy, so we held off.
on the fence
I'm still on the fence about which job to take.