[boom] 
| 1. | to make a deep, prolonged, resonant sound. |
| 2. | to move with a resounding rush or great impetus. |
| 3. | to progress, grow, or flourish vigorously, as a business or a city: Her business is booming since she enlarged the store. |
| 4. | to give forth with a booming sound (often fol. by out): The clock boomed out nine. |
| 5. | to boost; campaign for vigorously: His followers are booming George for mayor. |
| 6. | a deep, prolonged, resonant sound. |
| 7. | the resonant cry of a bird or animal. |
| 8. | a buzzing, humming, or droning, as of a bee or beetle. |
| 9. | a rapid increase in price, development, numbers, etc.: a boom in housing construction. |
| 10. | a period of rapid economic growth, prosperity, high wages and prices, and relatively full employment. |
| 11. | a rise in popularity, as of a political candidate. |
| 12. | caused by or characteristic of a boom: boom prices. |
[boom] | 1. | Nautical. any of various more or less horizontal spars or poles for extending the feet of sails, esp. fore-and-aft sails, for handling cargo, suspending mooring lines alongside a vessel, pushing a vessel away from wharves, etc. |
| 2. | Aeronautics.
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| 3. | a chain, cable, series of connected floating timbers, or the like, serving to obstruct navigation, confine floating timber, etc. |
| 4. | the area thus shut off. |
| 5. | Machinery. a spar or beam projecting from the mast of a derrick for supporting or guiding the weights to be lifted. |
| 6. | (on a motion-picture or television stage) a spar or beam on a mobile crane for holding or manipulating a microphone or camera. |
| 7. | to extend or position, as a sail (usually fol. by out or off). |
| 8. | to manipulate (an object) by or as by means of a crane or derrick. |
| 9. | to sail at full speed. |
| 10. | lower the boom, to take decisive punitive action: The government has lowered the boom on tax evaders. |