boom Definition in Cambridge American English Dictionary
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Definition of "boom" - American English Dictionary

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boomnoun [C]

 us   /bum/

boom noun [C] (PERIOD OF GROWTH)

social studies a period of sudden economic growth: Somehow farmers have survived the booms and busts of the past 50 years.

boom noun [C] (POLE)

a long, movable pole that holds the bottom edge of a sail and is attached to the mast of a boat In television and movie making, a boom is a long, movable pole that has a microphone (= device that records sound) or camera on one end.

boom noun [C] (DEEP SOUND)

a deep, loud sound: What you heard was the boom of a rocket.

boomverb

 us   /bum/

boom verb (MAKE A DEEP SOUND)

[I/T] to make a deep, loud sound: [I] A voice boomed through the microphone.

boom verb (GROW SUDDENLY)

[I] to experience a period of sudden economic growth: At that time, Alaska was booming.
(Definition of boom from the Cambridge Academic Content Dictionary © Cambridge University Press)
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