Boom (containment) definition

(1) 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

(2) A pole carrying an overhead microphone projected over a film or tv set

(3) A deep prolonged loud noise

(4) 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"

(5) A state of economic prosperity

(6) Grow stronger

"The economy was booming"

(7) Hit hard

"He smashed a 3-run homer"

(8) Make a deep hollow sound

"Her voice booms out the words of the song"

(9) Make a resonant sound, like artillery

"His deep voice boomed through the hall"

(10) Be the case that thunder is being heard

"Whenever it thunders, my dog crawls under the bed"