Antonym: loosen. Similar words: straighten, fighter, tightly, highlight, daughter, light, might, right. Meaning: ['taɪtn] 
v. 1. make tight or tighter 2. become tight or tighter 3. restrict 4. narrow or limit.
v. 1. make tight or tighter 2. become tight or tighter 3. restrict 4. narrow or limit. 
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31. They are now under a great deal of pressure to tighten their airport security.
32. We need to tighten security around the hotel during the president's visit.
33. Clearly, if you are spending more than your income, you'll need to tighten your belt.
34. It would be unseemly for judges to receive pay increases when others are having to tighten their belts.
35. Are there any plans to tighten up on advertising controls?
36. The United States plans to tighten the economic sanctions currently in place.
37. They inflicted a heavy defeat on the Government's plans to tighten asylum controls.
38. Until this week, every attempt to tighten up the law had failed.
39. Environmental groups are exerting pressure on the government to tighten pollution laws.
40. The proposed national identity card system would help to tighten security against fraud.
41. The government will have to tighten the purse strings .
42. He knows he has considerable support for his plans to tighten his grip on the machinery of central government.
43. Closing the border would tighten the screws on the terrorists.
44. I used my thumbnail to tighten the screw on my lamp.
45. We'll have to tighten our belts if we want to save any money for our holidays this year.
46. He accused ministers of breaking election pledges to tighten up on immigration.
47. Our main objective now is to tighten the grip we have on the market.
48. The prison was ordered to tighten security after a prisoner escaped yesterday.
49. The government is to tighten controls on the sale of alcohol.
50. Jane felt her muscles begin to tighten again.
51. Tighten the screw another two or three turns.
52. Let them tighten their belts like we have to.
53. The bill would tighten existing gun-control regulations.
54. Lissa felt her stomach muscles tighten[sentencedict.com],[http://sentencedict.com/tighten.html] and turned away.
55. You just need to tighten these two screws here.
56. The quick cold made her skin tighten.
57. My throat began to tighten until it hurt.
58. I need to tighten the screw on my glasses.
59. I felt my stomach tighten, unreason bubbling, rising.
60. Franco's noose began to tighten round Catalonia's neck.
More similar words: straighten, fighter, tightly, highlight, daughter, light, might, right, night, height, slight, flight, eighth, by night, insight, at night, delight, light up, all right, in sight, lightly, right away, slightly, midnight, nightmare, lighting, overnight, lightning, out of sight, day and night.