1. to make a deep, resonant sound.
2. to grow, develop, or progress rapidly; flourish: business is booming.
3. to utter or give forth with a deep, resonant sound: a field commander booming out orders.
4. to cause to grow or flourish; boost.
5. A deep resonant sound, as of an explosion.
6. A time of economic prosperity.
7. A sudden increase, as in popularity.
8. nautical A long spar extending from a mast to hold or extend the foot of a sail.
9. A long pole extending upward at an angle from the mast of a derrick to support or guide objects being lifted or suspended.
10. A barrier composed of a chain of floating logs enclosing other free-floating logs, typically used to catch floating debris or to obstruct passage.
11. A floating barrier serving to contain an oil spill.
12. A long movable arm used to maneuver and support a microphone.
13. A spar that connects the tail surfaces and the main structure of an airplane.
14. A long hollow tube attached to a tanker aircraft, through which fuel flows to another aircraft being refueled in flight.
15. to move or position using a crane: "the renegade logs somehow escaped while . . . the logs were boomed up into the mile-long rafts that ply these channels” ( jack Weatherford).
16. drop to act suddenly and forcefully to repress a practice or reprimand an offender; crack down.

1. to make a loud, resonant sound.
2. (figuratively, of speech) to exclaim with force, to shout, to thunder.
3. to make something boom.
4. to publicly praise.
5. A low-pitched, resonant sound, such as of an explosion.
6. one of the calls of certain monkeys or birds.
7. used to suggest the sound of an explosion.
8. A spar extending the foot of a sail; a spar rigged outboard from a ship's side to which boats are secured in harbour.
9. A movable pole used to support a microphone or camera.
10. A horizontal member of a crane or derrick, used for lifting.
11. the longest element of a yagi antenna, on which the other, smaller ones, are transversally mounted.
12. A floating barrier used to obstruct navigation, for military or other purposes; or used for the containment of an oil spill.
13. A wishbone shaped piece of windsurfing equipment.
14. the arm of a crane (mechanical lifting machine).
15. the section of the arm on a backhoe closest to the tractor.
16. A period of prosperity or high market activity.
17. to be prosperous.
18. to cause to advance rapidly in price.

1. A long pole or spar, run out for the purpose of extending the bottom of a particular sail
2. A long spar or beam, projecting from the mast of a derrick, from the outer end of which the body to be lifted is suspended.
3. A pole with a conspicuous top, set up to mark the channel in a river or harbor.
4. A strong chain cable, or line of spars bound together, extended across a river or the mouth of a harbor, to obstruct navigation or passage.
5. A line of connected floating timbers stretched across a river, or inclosing an area of water, to keep saw logs, etc., from floating away.
6. A hollow roar, as of waves or cannon; also, the hollow cry of the bittern; a booming.
7. A strong and extensive advance, with more or less noisy excitement; -- applied colloquially or humorously to market prices, the demand for stocks or commodities and to political chances of aspirants to office.
8. to cry with a hollow note; to make a hollow sound, as the bittern, and some insects.
9. to make a hollow sound, as of waves or cannon.
10. to rush with violence and noise, as a ship under a press of sail, before a free wind.
11. to have a rapid growth in market value or in popular favor; to go on rushingly.
12. to extend, or push, with a boom or pole.
13. to cause to advance rapidly in price.

1. to make a deep, hollow, continued sound.
2. to shove with a boom or spar.
3. to drive or guide (logs) down a stream with a boom or pole.
4. to pen or confine (logs) with a boom.
5. [the earliest instance of the word in this sense appears to be in the following passage:
6. mr. McCullagh, in a letter to one of the editors of this dictionary, says: “I cannot explain how I came to use it, except that, while on the gunboats on the mississippi river during the war, I used to hear the pilots say of the river, when rising rapidly and overflowing its banks, that it (the river) was ‘booming.’ the idea I wished to convey was that the grant movement was rising—swelling, etc. the word seemed to be a good one to the ear, and I kept it up. it was generally adopted about a year afterward. I used it as a noun after a while, and spoke of ‘the grant boom.’ ”]
7. to bring into prominence or public notice by calculated means; push with vigor or spirit: as, to boom a commercial venture, or the candidacy of an aspirant for office.
8. A deep, hollow, continued sound.
9. A long pole or spar used to extend the foot of certain sails of a ship: as, the main-boom, jib-boom, studdingsail-boom.
10. A strong barrier, as of beams, or an iron chain or cable fastened to spars, extended across a river or the mouth of a harbor, to prevent an enemy's ships from passing.
11. A chain of floating logs fastened together at the ends and stretched across a river, etc., to stop floating timber.
12. A pole set up as a mark to direct seamen how to keep the channel in shallow water.
13. plural A space in a vessel's waist used for stowing boats and spare spars.
14. A sudden increase of activity; a rush.
15. A pole fastened lengthwise of a load of hay to bind the load.

1. make a deep hollow sound
2. hit hard
3. a sudden happening that brings good fortune (as a sudden opportunity to make money)
4. make a resonant sound, like artillery
5. a deep prolonged loud noise
6. grow vigorously
7. a state of economic prosperity
8. 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
9. be the case that thunder is being heard
10. a pole carrying an overhead microphone projected over a film or tv set