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1. Exercising or taking care great enough to bring assurance
   "be sure to lock the doors";
   - certain
    
2. Having or feeling no doubt or uncertainty; confident and assured
   "was sure she had seen it"; "was very sure in his beliefs"; "sure of her friends";
   - certain
    
3. Physically secure or dependable
   "a sure footing"; "was on sure ground"
    
4. Reliable in operation or effect
   "a sure way to distinguish the two"; "wood dust is a sure sign of termites";
   - certain
    
5. (of persons) worthy of trust or confidence
   "a sure friend";
   - trusted
    
6. Infallible or unfailing
   "a sure (or true) sign of one's commitment"
    
7. Certain not to fail
   "a sure hand on the throttle"
    
8. Impossible to doubt or dispute
   "sure proof";
   - indisputable
    
9. Certain to occur; destined or inevitable
   "sudden but sure regret"; "he is sure to win";
   - certain

1. Definitely or positively
   "it's going to be a good day for sure"; "they thought he had been killed sure enough"; "he'll win sure as shooting"; "they sure smell good"; "sure he'll come";
   - surely, certainly, for sure, for certain, sure enough, sure as shooting

1. [N. Amer] Polite response to a thank you
   - don't mention it, my pleasure, no problem, not at all, you bet [informal], you're welcome
    
2. [informal] Indicates an affirmative response
   - ay [dialect], aye [dialect], uh-huh [informal], yah [UK, informal], yea [informal], yeah [informal], yep [informal], yes, yup [informal], ya [S.Africa, informal], certainly

Sounds like: e, sure, psha

Derived forms: surest, surer

See also: assurance, authority, bound, careful, certain, certainty, confidence, confident, convinced, dependable, destined, doomed, fated, foreordained, in for, positive, predestinate, predestined, predictable, reliable, secure, self-assurance, self-confidence, steady, straight-up [informal], sureness, true, trustable, trustworthy, trusty

Antonym: incertain [non-standard]

Encyclopedia: Sure