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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31. I'm sure my neighbours spy on me.
32. I'm sure she'll be an asset to the team.
33. Make sure you back up your files.
34. I'm sure he needs no introduction.
35. I'm not sure that I find her story credible.
36. I'm not sure how to put this.
37. Be sure to leave the room neat and tidy.
38. I'm not sure. Probably around midnight.
39. Don't fret - I'm sure he's OK.
40. Each morning cleaners make sure everything is spotless.
41. I am sure he will win the game.
42. Make sure you're at the check-in by 5.30.
43. I'm pretty sure I'll be going.
44. I'm pretty sure he'll say yes.
45. I'm not sure that I fully understand .
46. Make sure the paint covers the surface evenly.
47. Make sure all the windows are closed.
48. The prisoner is sure to be condemned.
49. I'll just make sure I've turned the oven off.
50. Yes[http://Sentencedict.com], I'm sure I can do it.
51. Make sure that you are not underinsured.
52. 'Are you sure?' he asked her.
53. We cannot say for sure what will happen.
54. Make sure that good behaviour is rewarded.
55. Are you sure? Memory can play tricks on you.
56. I think he's coming, but I'm not quite sure.
57. Make sure you wash up well.
58. I'm not sure whether I should tell you this.
59. I'm not sure what you mean.
60. We must make sure this doesn't happen again.
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.