boom

A boom is a very loud, deep sound that echoes. The distant boom of fireworks might spook your nervous dog.

Guns, thunder, drums, deep voices — all of these are capable of a pretty loud boom. When they make the sound, you can also say that they boom: "I saw the flash of lightning and got ready for the thunder to boom." Another kind of boom is a prosperous period, like an oil boom or an economic boom. The long pole that holds a microphone or the sail on a boat is yet another type of boom.

Primary Meanings of boom

1.
nv
a deep prolonged loud noise
make a deep hollow sound
2.
nv
a sudden happening that brings good fortune (as a sudden opportunity to make money)
grow vigorously
3.
n
any of various more-or-less horizontal spars or poles used to extend the foot of a sail or for handling cargo or in mooring
Full Definitions of boom
1

n a deep prolonged loud noise

Synonyms:
roar, roaring, thunder
Type of:
noise
sound of any kind (especially unintelligible or dissonant sound)

v make a deep hollow sound

“Her voice booms out the words of the song”
Synonyms:
boom out
Type of:
go, sound
make a certain noise or sound

v make a resonant sound, like artillery

“His deep voice boomed through the hall”
Synonyms:
din
Type of:
go, sound
make a certain noise or sound

v be the case that thunder is being heard

Synonyms:
thunder

v hit hard

Synonyms:
blast, nail, smash
Type of:
hit
deal a blow to, either with the hand or with an instrument
2

n a sudden happening that brings good fortune (as a sudden opportunity to make money)

“the demand for testing has created a boom for those unregulated laboratories where boxes of specimen jars are processed like an assembly line”
Synonyms:
bonanza, bunce, godsend, gold rush, gravy, manna from heaven, windfall
Type of:
happening, natural event, occurrence, occurrent
an event that happens

n a state of economic prosperity

Type of:
prosperity
an economic state of growth with rising profits and full employment

v grow vigorously

“business is booming
Synonyms:
expand, flourish, thrive
Types:
revive
be brought back to life, consciousness, or strength
luxuriate
thrive profusely or flourish extensively
Type of:
grow
become larger, greater, or bigger; expand or gain
3

n any of various more-or-less horizontal spars or poles used to extend the foot of a sail or for handling cargo or in mooring

Type of:
spar
a stout rounded pole of wood or metal used to support rigging

n a pole carrying an overhead microphone projected over a film or tv set

Synonyms:
microphone boom
Type of:
pole
a long (usually round) rod of wood or metal or plastic

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