boom /ˈbum/
 繁榮,隆隆聲(vi.)急速發展,發隆隆聲(vt.)使興旺,發隆隆聲


 boom
 主杆


 Boom n.
 1. Naut. A long pole or spar, run out for the purpose of extending the bottom of a particular sail; as, the jib boom, the studding-sail boom, etc.
 2. Mech. A long spar or beam, projecting from the mast of a derrick, from the outer end of which the body to be lifted is suspended.
 3. A pole with a conspicuous top, set up to mark the channel in a river or harbor. [Obs.]
 4. Mil. & Naval A strong chain cable, or line of spars bound together, extended across a river or the mouth of a harbor, to obstruct navigation or passage.
 5. Lumbering A line of connected floating timbers stretched across a river, or inclosing an area of water, to keep saw logs, etc., from floating away.
 Boom iron, one of the iron rings on the yards through which the studding-sail booms traverse.
 The booms, that space on the upper deck of a ship between the foremast and mainmast, where the boats, spare spars, etc., are stowed.


 Boom v. t. Naut. To extend, or push, with a boom or pole; as, to boom out a sail; to boom off a boat.


 Boom v. i. [imp. & p. p. Boomed p. pr. & vb. n. Booming.]
 1. To cry with a hollow note; to make a hollow sound, as the bittern, and some insects.
 At eve the beetle boometh
 Athwart the thicket lone.   --Tennyson.
 2. To make a hollow sound, as of waves or cannon.
    Alarm guns booming through the night air.   --W. Irving.
 3. To rush with violence and noise, as a ship under a press of sail, before a free wind.
    She comes booming down before it.   --Totten.
 4. To have a rapid growth in market value or in popular favor; to go on rushingly.


 Boom, n.
 1. A hollow roar, as of waves or cannon; also, the hollow cry of the bittern; a booming.
 2. A strong and extensive advance, with more or less noisy excitement; -- applied colloquially or humorously to market prices, the demand for stocks or commodities and to political chances of aspirants to office; as, a boom in the stock market; a boom in coffee. [Colloq. U. S.]


 Boom, v. t. To cause to advance rapidly in price; as, to boom railroad or mining shares; to create a “boom” for; as to boom Mr. C. for senator. [Colloq. U. S.]

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 boom
      n 1: a deep prolonged loud noise [syn: roar, roaring, thunder]
      2: a state of economic prosperity
      3: a sudden happening that brings good fortune (as a sudden
         opportunity to make money); "the demand for testing has
         created a boom for those unregulated laboratories where
         boxes of specimen jars are processed lik an assembly line"
         [syn: bonanza, gold rush, gravy, godsend, {manna
         from heaven, windfall, bunce]
      4: a pole carrying an overhead microphone projected over a film
         or tv set [syn: microphone boom]
      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
      v 1: make a resonant sound, like artillery; "His deep voice
           boomed through the hall" [syn: din]
      2: hit hard; "He smashed a 3-run homer" [syn: smash, nail,
         blast]
      3: be the case that thunder is being heard; "Whenever it
         thunders, my dog crawls under the bed" [syn: thunder]
      4: make a deep hollow sound; "Her voice booms out the words of
         the song" [syn: boom out]
      5: grow stronger; "The economy was booming" [syn: prosper, thrive,
          get ahead, flourish, expand]