boom

1 :  a booming sound or cry —often used interjectionally to indicate suddenness then boom, he was fired

2 :  a rapid expansion or increase: such asa :  a general movement in support of a candidate for officeb :  rapid settlement and development of a town or districtc :  a rapid widespread expansion of economic activityd :  an upsurge in activity, interest, or popularity a folk music boom

1 :  a long spar used to extend the foot of a sail

2a :  a chain or line of connected floating timbers extended across a river, lake, or harbor (as to obstruct passage or catch floating objects)b :  a temporary floating barrier used to contain an oil spill

3a :  a long beam projecting from the mast of a derrick to support or guide cargob :  a long more or less horizontal supporting arm or brace (as for holding a microphone)

4 :  a spar or outrigger connecting the tail surfaces and the main supporting structure of an aircraft

1 :  to make a deep, hollow, and loud sound The cannon boomed.

2 :  to increase or develop rapidly Business boomed last year.

1 :  a deep, hollow, and loud sound

2 :  a rapid increase in activity or popularity a sales boom

1 :  a long pole attached to the bottom of a sail

2 :  a long beam sticking out from the mast of a derrick to support or guide something that is being lifted

3 :  a long pole for holding a microphone