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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91. Make sure she gets plenty of fresh air.
92. I hope you are sure of your facts.
93. Make sure your hands are clean before you have your dinner.
94. Looking round to make sure he was unobserved, he slipped through the door.
95. Turning away under a strong attack is a sure recipe for defeat.
96. He glanced about to make sure that the audience were ready to hear his speech.
97. I'm sure you can do an excellent job next time.
98. I think this is their house,[www.Sentencedict.com] but I'm not sure.
99. In the exam there's sure to be a question on energy.
100. Make sure that all the nails are punched in so that the floor is smooth.
101. Make sure you keep within the new lower speed limit.
102. He'd never been in a class before and he was not even sure that he should have been teaching.
103. You have to make sure you're comparing like with like.
104. I'm sure there are some folk who would rather they weren't here.
105. I never doubted you; I was sure you would bring me the money.
106. Kate looks really unhappy - I'd better make sure she's all right.
107. Even if you did see someone, you can't be sure it was him.
108. To love someone in secret is like a seed in bottle waiting for growing up, though not sure whether the future will be more beautiful, still waiting it earnestly and eagerly.
109. I'm sure that being late for the interview counted against me.
110. She looked over her shoulder to be sure of her footing.
111. I'm not sure how he's going to react to the news.
112. I'm not sure if his forcefulness is an asset or a liability.
113. Your life only lasts for a few decades, so be sure that you don't leave any regrets. Laugh or cry as you like, and it's meaningless to oppress yourself.
114. Make sure you have a balanced intake of vitamins A, B, C and D.
115. The charges are false, and we are sure we will be vindicated in court.
116. I'm sure you can do a better job next time.
117. We need to make sure that we exploit our resources as fully as possible.
118. I must be sure to fork over the whole garden before the winter.
119. Life is too short. Be sure that you have never had any regrets in your life.
120. 'I'm sure he didn't mean to be rude.' 'Quite possibly , but the damage has been done.'
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.