| boom | |
| 1. v. To make a loud, hollow, resonant sound. | |
| Thunder boomed in the distance and lightning flashes lit up the horizon. | |
| The cannon boomed, recoiled, and spewed a heavy smoke cloud. | |
| Beneath the cliff, the sea was booming on the rocks. | |
| I can hear the organ slowly booming from the chapel. | |
| 2. v. (transitive figuratively, of speech) To exclaim with force, to shout, to thunder. | |
| 3. v. To make something boom. | |
| Men in grey robes slowly booming the drums of death. | |
| 4. v. (slang) To publicly praise. | |
| 5. v. To rush with violence and noise, as a ship under a press of sail, before a free wind. | |
| 6. n. A low-pitched, resonant sound, such as of an explosion. | |
| The boom of the surf. | |
| 7. n. One of the calls of certain monkeys or birds. | |
| 8. interj. used to suggest the sound of an explosion. | |
| 9. interj. used to suggest something happening suddenly and unexpectedly. | |
| 10. n. (nautical) A spar extending the foot of a sail; a spar rigged outboard from a ship's side to which boats are secured in harbour. | |
| 11. n. A movable pole used to support a microphone or camera. | |
| 12. n. A horizontal member of a crane or derrick, used for lifting. | |
| 13. n. (electronics) The longest element of a Yagi antenna, on which the other, smaller ones are transversally mounted. | |
| 14. n. A floating barrier used to obstruct navigation, for military or other purposes; or used for the containment of an oil spill or to control the flow of logs from logging operations. | |
| 15. n. A wishbone-shaped piece of windsurfing equipment. | |
| 16. n. The section of the arm on a backhoe closest to the tractor. | |
| 17. n. A gymnastics apparatus similar to a balance beam. | |
| 18. v. To extend, or push, with a boom or pole. | |
| to boom out a sail; to boom off a boat | |
| 19. n. (economics, business) A period of prosperity, growth, progress, or high market activity. | |
| 20. v. (intransitive) To flourish, grow, or progress. | |
| The population boomed in recent years. | |
| Business was booming. | |
| 21. v. (transitive, dated) To cause to advance rapidly in price. | |
| to boom railroad or mining shares | |
