Etymology: (1300–50; ME sur(e) < MF sur, OF seur < L sēcūrussecure)
Definition of 'sure'
Princeton's WordNet
1. (adj)certain(p), sure 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. (adj)certain, sure exercising or taking care greatenough to bring assurance "be certain to disconnect the iron when you are through"; "be sure to lock the doors"
3. (adj)certain, sure 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. (adj)sure physically secure or dependable "a sure footing"; "was on sure ground"
5. (adj)certain, sure reliable in operation or effect "a quick and certain remedy"; "a sure way to distinguish the two"; "wood dust is a sure sign of termites"
6. (adj)sure, trusted (of persons) worthy of trust or confidence "a sure (or trusted) friend"
7. (adj)sure infallible or unfailing "a sure (or true) sign of one's commitment"
8. (adj)sure certain not to fail "a sure hand on the throttle"
9. (adverb)indisputable, sure impossible to doubt or dispute "indisputable (or sure) proof"
10. (adverb)surely, certainly, sure, for sure, for certain, sure enough, sure as shooting definitely or positively (`sure' is sometimes used informally for `surely') "the results are surely encouraging"; "she certainly is a hard worker"; "it's going to be a good day for sure"; "they are coming, for certain"; "they thought he had been killed sure enough"; "he'll win sure as shooting"; "they sure smell good"; "sure he'll come"
1. (adjective)sure certain about sth I'm not sure how old she is.; He wasn't sure where he'd see her before.; Are you sure that it's convenient for you?
2. sure certain to occur in a particular way It was a badly run project that was sure to fail.
3. sure be sure to used to advise sb about what they should do Be sure to call me if you need a ride home.
4. sure for sure definitely We'll get home very late, that's for sure.
5. sure make sure to check sth Make sure that you write your name on each page.
6. sure to do sth so that sth is certain to happen Call them to make sure they don't forget to bring it.
7. sure sure of yourself confident I wasn't feeling very sure of myself.
8. (adverb)sure indicates agreement or acceptance "Would you help me out?" "Sure, what do you want me to do?"
9. sure sure enough indicates sth happened the way you predicted I said he'd come and, sure enough, he's here!
Definition of 'sure'
Webster Dictionary
1. (adverb)sure in a sure manner; safely; certainly
Sense: (negativeunsure) having no doubt; certain I'm sure that I gave him the book; I'm not sure where she lives / what her address is; `There's a bus at two o'clock.' `Are you quite sure?'; I thought the idea was good, but now I'm not so sure; I'll help you; – you can be sure of that!
Definitions of sure 
Afrikaans: seker, verseker
Arabic: مُتأكِّد
Bulgarian: убеден
Brazilian: certo
Czech: jistý
German: sicher
Danish: sikker på; sikker
Greek: σίγουρος
Spanish: seguro; convencido
Estonian: kindel
Farsi: خاطرجمع
Finnish: varma
French: sûr
Hebrew: בָּטוּחַ
Hindi: निस्संशय, गतसंदेह
Croatian: izvjestan, siguran
Hungarian: biztos
Indonesian: pasti
Icelandic: viss,öruggur
Italian: sicuro
Japanese: 確信する
Korean: 확신하는
Lithuanian: tikras,įsitikinęs
Latvian: pārliecināts; drošs
Malay: pasti
Dutch: zeker
Norwegian: sikker, viss
Polish: pewny
Persian: خاطرجمع
Pashto: خاطر جمع
Portuguese: certo
Romanian: sigur
Russian: уверенный
Slovak: istý
Slovenian: prepričan
Serbian: siguran
Swedish: säker, förvissad
Thai: แน่นอน
Turkish: emin,şüphesi olmayan
Taiwanese: 肯定的
Ukrainian: вірний, безпомилковий
Urdu: یقینی، بلا شبہ
Vietnamese: chắc chắn, có thể tin đượ
Chinese: 肯定的
