What is the meaning of boom?

noun

• A deep prolonged loud noise.
  • synonyms: roar, roaring, thunder
• A state of economic prosperity.
• A sudden happening that brings good fortune (as a sudden opportunity to make money. )
  • usage: "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, gold rush, gravy, godsend, manna from heaven, windfall, bunce
• A pole carrying an overhead microphone projected over a film or tv set.
  • synonyms: microphone 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.

verb

• Make a resonant sound, like artillery.
  • usage: "His deep voice boomed through the hall"
  • synonyms: din
• Hit hard.
  • usage: "He smashed a 3-run homer"
  • synonyms: smash, nail, blast
• Be the case that thunder is being heard.
  • usage: "Whenever it thunders, my dog crawls under the bed"
  • synonyms: thunder
• Make a deep hollow sound.
  • usage: "Her voice booms out the words of the song"
  • synonyms: boom out
• Grow vigorously.
  • usage: "The deer population in this town is thriving"; "business is booming"
  • synonyms: thrive, flourish, expand