boom

1. A low-pitched, resonant sound, such as of an explosion.

   The boom of the surf.

2. A rapid expansion or increase.

   You should prepare for the coming boom in the tech industry.

3. One of the calls of certain monkeys or birds.

1. To make a loud, hollow, resonant sound.

   I can hear the organ slowly booming from the chapel.

2. (of speech) To exclaim with force, to shout, to thunder.
3. To make something boom.

   Men in grey robes slowly boom the drums of death.

4. To publicly praise.
5. To rush with violence and noise, as a ship under a press of sail, before a free wind.

1. Used to suggest the sound of an explosion.
2. Used to suggest something happening suddenly and unexpectedly.

1. A spar extending the foot of a sail; a spar rigged outboard from a ship's side to which boats are secured in harbour.
2. A movable pole used to support a microphone or camera.
3. A horizontal member of a crane or derrick, used for lifting.
4. The longest element of a Yagi antenna, on which the other, smaller ones are transversally mounted.
5. 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.
6. A wishbone-shaped piece of windsurfing equipment.
7. The section of the arm on a backhoe closest to the tractor.
8. A gymnastics apparatus similar to a balance beam.

1. To extend, or push, with a boom or pole.

   to boom off a boat

2. (usually with "up" or "down") To raise or lower with a crane boom.

noun

A period of prosperity, growth, progress, or high market activity.

1. To flourish, grow, or progress.

   Business was booming.

2. To cause to advance rapidly in price.

   to boom railroad or mining shares