Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “boom”

boom

noun [C]  /bum/ us  

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.

boom

verb  /bum/ us  

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)
What is the pronunciation of boom?
Browse related topics

You are looking at an entry to do with Poles, rods, shafts and sticks, but you might be interested in these topics from the Objects topic area:

Add Cambridge dictionaries to your browser to your website

More American English definitions for “boom”

Definitions of “boom” in other dictionaries

Word of the Day

see the light of day

When something sees the light of day, it appears for the first time.

Word of the Day

Highly delighted, bitterly disappointed, ridiculously cheap: adverbs for emphasis.

by Liz Walter,
October 22, 2014
We often make adjectives stronger by putting an adverb in front of them. The most common ones are very and, for a stronger meaning, extremely: He was very pleased. The ship is extremely large. However, we don’t use very or extremely for adjectives that already have a strong meaning, for example fantastic,

Read More 

life tracking noun

October 20, 2014
the use of one or more devices or apps to monitor health, exercise, how time is spent, etc.

Read More