—boomingly, adv./boohm/, v.i.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.v.t.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.n.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.adj.12. caused by or characteristic of a boom: boom prices.[1400-50; 1910-15 for def. 10; late ME bombon, bummyn to buzz; c. D bommen, G bummen, orig. imit.]Syn. 3. prosper, thrive, develop.boom2—boomless, adj./boohm/, n.1. Naut. 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. Aeron.a. an outrigger used on certain aircraft for connecting the tail surfaces to the fuselage.b. a maneuverable and retractable pipe on a tanker aircraft for refueling another aircraft in flight.c. chord1 (def. 4).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. Mach. 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. lower the boom, to take decisive punitive action: The government has lowered the boom on tax evaders.v.t.9. to manipulate (an object) by or as by means of a crane or derrick.v.i.10. to sail at full speed.
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