Synonym: advance, beam, flourish, gain, grow, increase, pole, progress, roar, rumble, swell, thrive, thunder. Antonym: slump. Similar words: room, book, boot, booth, boost, bedroom, book for, bathroom. Meaning: [buːm] 
n. 1. a deep prolonged loud noise 2. a state of economic prosperity 3. a sudden happening that brings good fortune (as a sudden opportunity to make money) 4. a pole carrying an overhead microphone projected over a film or tv set 5. any of various more-or-less horizontal spars or poles used to extend the foot of a sail or for handling cargo or in mooring. v. 1. make a resonant sound, like artillery 2. hit hard 3. be the case that thunder is being heard 4. make a deep hollow sound 5. grow stronger.
n. 1. a deep prolonged loud noise 2. a state of economic prosperity 3. a sudden happening that brings good fortune (as a sudden opportunity to make money) 4. a pole carrying an overhead microphone projected over a film or tv set 5. any of various more-or-less horizontal spars or poles used to extend the foot of a sail or for handling cargo or in mooring. v. 1. make a resonant sound, like artillery 2. hit hard 3. be the case that thunder is being heard 4. make a deep hollow sound 5. grow stronger. 
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31. He made his pile during the property boom.
32. The stillness of night was broken by the boom of a cannon.
33. It seems the boom in World Music has run its course.
34. The square echoed and re-echoed to the boom of a 21-gun salute.
35. The corruption does not seem to have muted the country's prolonged economic boom.
36. The boom in the sport's popularity has meant more calls for stricter safety regulations.
37. In recent years, the small town has enjoyed a bigger boom than ever.
38. U.S. manufacturers may find the export boom stopping dead in its tracks.
39. London was a boom town and the stock market was soaring.
40. Public transport has not been able to cope adequately with the travel boom.
41. There was a baby boom in Britain and the US after World War II.
42. Many of the sites launched at the peak of the Internet boom have now disappeared.
43. The insurance business suffered from a vicious cycle of boom and bust.
44. The collective name for mast, boom and sails on a boat is the 'rig'.
45. The guns went "boom".
46. The evanescent post - war economic boom was quickly followed by a deep recession.
47. The deep boom of a foghorn echoed across the bay.
48. There is usually a sonic boom when an aircraft breaks the sound barrier.
49. The 1980s property boom in and around London helped to create a North/South divide in the cost of housing.
50. He made a small fortune in the London property boom.
51. The boom of the 1980s led to a taste for petrol-guzzling cars.
52. Government policy encouraged a consumer boom followed by a deep recession.
53. The only way to satisfy the golf boom was to build more courses.
54. The country is basking in a great boom in industry.
55. The answer is a baby boom.
56. People braced for a new oil boom.
57. All this means that the investment boom is over.
58. The 1970s were the boom years.
59. Suddenly the boom in Dallas turned to bust.
60. It was cashing in a spectacular consumer boom.