Boom

A boom can mean different things:

• A boom is a low-pitched sound, often reverberant. The sound of thunder and the sound of an explosion are often called booms.
• A boom is a long bar:
  • used in sailing and windsurfing to hold the sail.
  • used in waterskiing for the beginning skier to hold onto.
  • used in movies and television to hold microphones.
• Boom is a municipality in Belgium