| 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. |

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