noun a deep prolonged loud noise.
— synonyms: roar, roaring, thunder
noun a state of economic prosperity.
noun a sudden happening that brings good fortune (as a sudden opportunity to make money).
— synonyms: bonanza, gold_rush, gravy, godsend, manna_from_heaven, windfall, bunce
noun a pole carrying an overhead microphone projected over a film or tv set.
— synonyms: microphone_boom
noun 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.
Examples
“The boom of the surf.”
“You should prepare for the coming boom in the tech industry.”
“I can hear the organ slowly booming from the chapel.”