To make a loud, hollow, resonant sound.
(figuratively, transitive) To exclaim with force, to shout, to thunder.
(intransitive) To flourish, grow, or progress.
(transitive) To make (something) boom.
To make a deep, resonant, territorial vocalisation.
(intransitive) To cause a sonic boom.
(slang, transitive) To subject (someone or something) to a sonic boom.
(US, obsolete, slang) To publicly praise, to rally behind.
To rush forwards with such violent intensity that it generates a sustained, overwhelming, roaring noise; especially from the perspective of a bystander who has been suddenly subjected to it.
(slang) To rapidly adjust the evaluation of a position away from zero, indicating a likely win or loss.
(dated, transitive) To cause to advance rapidly in price.

A spar extending the foot of a sail; a spar rigged outboard from a ship's side to which boats are secured in harbour.
A specially-designed, movable pole, used to suspend a microphone or camera high above the ground during filming or recording.
(abbreviation, alt-of, broadly, ellipsis) Ellipsis of boom microphone (a microphone supported on such a pole).
A horizontal member of a crane or derrick, used for lifting.
The longest element of a Yagi-Uda antenna, on which the other, smaller antennae are transversally mounted.
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.
A gymnastics apparatus, similar to a balance beam, which must be traversed as part of an obstacle course, typically as a training exercise in school or as part of basic training for new military recruits.
A wishbone-shaped piece of windsurfing equipment.
The section of the arm on a backhoe closest to the tractor.

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