Collins COBUILD Advanced Learner's English Dictionary - unsure

1. If you are unsure of yourself, you lack confidence. He made her feel hot, and awkward, and unsure of herself... The evening show was terrible, with hesitant unsure performances from all. ? confident, sure ADJ: usu v-link ADJ, oft ADJ of n 2. If you are unsure about something, you feel uncertain about it. Fifty-two per cent were unsure about the idea... Scientists are becoming increasingly unsure of the validity of this technique. ? certain ADJ: v-link ADJ, oft ADJ about/of n