Adjective
1. having or feeling no doubt or uncertainty; confident and assured;
"felt certain of success""was sure (or certain) she had seen it""was very sure in his beliefs""sure of her friends"2. exercising or taking care great enough to bring assurance;
"be certain to disconnect the iron when you are through""be sure to lock the doors"3. certain to occur; destined or inevitable;
"he was certain to fail""his fate is certain""In this life nothing is certain but death and taxes"- Benjamin Franklin"he faced certain death""sudden but sure regret""he is sure to win"4. physically secure or dependable;
"a sure footing""was on sure ground"5. capable of being depended on;
"a quick and certain remedy""a sure way to distinguish the two""wood dust is a sure sign of termites"6. (of persons) worthy of trust or confidence;
"a sure (or trusted) friend"7. infallible or unfailing;
"a sure (or true) sign of one's commitment"8. certain not to fail;
"a sure hand on the throttle"9. impossible to doubt or dispute;
"indisputable (or sure) proof"