marked by or given to feelings of confident certainty
- "wood dust is a sure sign of termites"
- "a sure way to distinguish the two"
- "he is sure to win"
- "sudden but sure regret"
- "indisputable (or sure) proof"
- "be sure to lock the doors"
physically secure or dependable certain not to fail
- "a sure hand on the throttle"
- "a sure footing"
- "was on sure ground"
(of persons) worthy of trust or confidence
- "a sure (or trusted) friend"