boom definition

1. a deep prolonged loud noise
2. a state of economic prosperity
3. a sudden happening that brings good fortune (as a sudden opportunity to make money)
• examples: the demand for testing has created a boom for those unregulated laboratories where boxes of specimen jars are processed like an assembly line
4. a pole carrying an overhead microphone projected over a film or tv set
5. 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
6. make a resonant sound, like artillery
• examples: His deep voice boomed through the hall
7. make a deep hollow sound
• examples: Her voice booms out the words of the song
8. grow vigorously
• examples: The deer population in this town is thriving
• examples: business is booming