Learn how to say Boom correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word boom:
a loud, deep, resonant sound:
the deep boom of the bass drum
the characteristic resonant cry of the bittern:
the boom of the bittern may be enjoyed in the country
make a loud, deep, resonant sound:
thunder boomed in the sky
[with direct speech] say in a loud, deep, resonant voice:
‘Stop right there,’ boomed the Headmaster
(of a bittern) utter its characteristic resonant cry:
a dozen bitterns boom mysteriously from the reeds
British informal an exclamation made after delivering the punchline of a joke.
[popularized by the fox puppet Basil Brush, a character in a British television comedy show]
adjective (boomier, boomiest)
late Middle English (as a verb): ultimately imitative; perhaps from Dutch bommen ‘to hum, buzz’