There are several meanings of the word boom:

• a sound such as a sonic boom - onomatopoeia the sound of an explosion.
• a mechanical arm for holding equipment, like a microphone
• boom (sailing) - a spar at the foot of a mainsail on a sailing boat.
• Boom (source port) - source port for Doom
• an economic boom - a time of rapid growth in wealth, as in a boom town.
• Boom, Antwerp - a municipality within Antwerp, Belgium. In Dutch (the native language of Boom) boom also means "tree". Legend says the town got its name from a big tree.
• Boom , a 1968 movie directed by Joseph Losey
• boom , a song recorded by christian rock group P.O.D.