boom, bonanza, gold rush, gravy, godsend, manna from heaven, windfall, bunce -- (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")
boom, microphone boom -- (a pole carrying an overhead microphone projected over a film or tv set)
boom -- (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)
Overview of verb boom
The verb boom has 5 senses
boom, din -- (make a resonant sound, like artillery; "His deep voice boomed through the hall")