Synonym: absolute, certain, decided, definite, positive. Antonym: unsure. Similar words: assure, ensure, for sure, exposure, make sure, measure up, measure up to, measurement. Meaning: [ʃʊr /ʃʊə] 
adj. 1. having or feeling no doubt or uncertainty; confident and assured 2. exercising or taking care great enough to bring assurance 3. certain to occur; destined or inevitable 4. physically secure or dependable 5. reliable in operation or effect 6. (of persons) worthy of trust or confidence 7. infallible or unfailing 8. certain not to fail 9. impossible to doubt or dispute. adv. definitely or positively (`sure' is sometimes used informally for `surely').
adj. 1. having or feeling no doubt or uncertainty; confident and assured 2. exercising or taking care great enough to bring assurance 3. certain to occur; destined or inevitable 4. physically secure or dependable 5. reliable in operation or effect 6. (of persons) worthy of trust or confidence 7. infallible or unfailing 8. certain not to fail 9. impossible to doubt or dispute. adv. definitely or positively (`sure' is sometimes used informally for `surely'). 
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181. Give it another screw to make sure the lid doesn't come off while we're travelling.
182. I would like to do it with you, but I am not sure whether my parents permit.
183. Congratulations upon having received your Doctorate in Philosophy.I know this has meant years of study and hard work on your part, and it is an achievement you can well be proud of.I am sure, from the fine record, that you will be equally successful in whatever career you pursue.
184. I'm not sure if Karen is ready for marriage yet.
185. People injecting drugs can never be sure that they're using unadulterated substances.
186. If you saw a traffic accident, make sure to mark down the licence of the car.
187. The first step in empowering the poorest sections of society is making sure they vote.
188. Be sure to dig the whole garden over before winter.
188. Wish you can benefit from our online sentence dictionary and make progress every day!
189. Are you sure that I can follow this diet without detriment to my health?
190. I shall certainly be present at the meeting, but I am not sure about my wife.
191. I'm sure that the patient can weather out this crisis.
192. I am sure that I put the money in the box.
193. He said it would rain, but I disagreed with him — I was sure it wouldn't rain.
194. Make sure you keep the key in a safe place.
195. His parents made a lot of sacrifices to make sure he got a good education.
196. I'm sure we never hear about a lot of what goes on in government.
197. There's absolutely no regulation of cigarettes to make sure that they don't include poisonous substances.
198. I'm not sure that I understand. Go over it again.
199. Become a better person and be sure to know who you arebefore meeting someone nes and hoping that person knows who you are.
200. Give the new arrangements time to shake down - I'm sure they'll be OK.
201. Make sure students realise that 'fat' is an unflattering or pejorative word.
202. The US will need a three-to-one superiority in forces to be sure of a successful attack.
203. No man can be happy without a friend, nor be sure of his friend till he is unhappy.
204. I'm sure we watched the nightly news, and then we turned on the movie.
205. Labour are sure to get in at the next election.
206. They had been invited to a Hindu wedding and were not sure what happened on such occasions.
207. That's a sure recipe for destroying the economy and creating chaos.
208. He always made sure that any cuts were protected by sterile dressings.
209. He's dreading his driving test - he's sure he's going to fail.
210. I'm not sure what he does exactly - it's something to do with finance.
More similar words: assure, ensure, for sure, exposure, make sure, measure up, measure up to, measurement, survey, surgeon, surgery, surface, survival, survivor, surround, insurance, surprising, surrounding, surveillance, surprisingly, bureau, injure, figure, gesture, feature, culture, picture, lecture, texture, venture.