boom

I

[[t]bum[/t]]

v. i.

1) to make a deep, prolonged, resonant sound

2) to move with a great rush

3) to progress, grow, or flourish vigorously:

Business is booming since we enlarged the store[/ex]

4) to announce or give forth with a booming sound (often fol. by out)

5) to boost; campaign for vigorously

6) a deep, prolonged, resonant sound

7) anb the resonant cry of a bird or animal

8) bus a rapid increase in sales, development, etc

9) bus a period of rapid economic growth, prosperity, high wages and prices, and relatively full employment

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Etymology: 1400–50; late ME bombon, bummyn to buzz boom′ing•ly, adv. II

boom

[[t]bum[/t]] n.

1) navig. any of various spars or poles projecting from a ship's mast and used to extend sails, handle cargo, etc

2) navig. a chain, cable, etc., serving to obstruct navigation

3) mac a spar or beam projecting from the mast of a derrick for supporting or guiding the weights to be lifted

4) sbz mot (on a motion-picture or television stage) a spar or beam on a mobile crane for holding or manipulating a microphone or camera

5) to manipulate (an object) by or as if by means of a crane or derrick

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- lower the boom

Etymology: 1635–45; < D: tree, pole, beam