1.Definition: (of persons) worthy of trust or confidence

"A sure (or trusted) friend"

Related Adjective(s):trusted

2.Definition: certain not to fail

"A sure hand on the throttle"

3.Definition: certain to occur; destined or inevitable

"Sudden but sure regret", "He is sure to win"

Related Adjective(s):certain

4.Definition: exercising or taking care great enough to bring assurance

"Be sure to lock the doors"

Related Adjective(s):certain

5.Definition: having or feeling no doubt or uncertainty; confident and assured

"Was sure (or certain) she had seen it", "Was very sure in his beliefs", "Sure of her friends"

Related Adjective(s):certain

6.Definition: impossible to doubt or dispute

"Indisputable (or sure) proof"

Related Adjective(s):indisputable

7.Definition: infallible or unfailing

"A sure (or true) sign of one's commitment"

8.Definition: physically secure or dependable

"A sure footing", "Was on sure ground"

9.Definition: reliable in operation or effect

"A sure way to distinguish the two", "Wood dust is a sure sign of termites"

Related Adjective(s):certain