The Collaborative International Dictionary of English v.0.48:

Boom \Boom\ (b[=oo]m), v. i. [imp. & p. p. Boomed, p. pr. &
   vb. n. Booming.] [Of imitative origin; cf. OE. bommen to
   hum, D. bommen to drum, sound as an empty barrel, also W.
   bwmp a hollow sound; aderyn y bwmp, the bird of the hollow
   sound, i. e., the bittern. Cf. Bum, Bump, v. i., Bomb,
   v. i.]
   1. To cry with a hollow note; to make a hollow sound, as the
      bittern, and some insects.
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            At eve the beetle boometh
            Athwart the thicket lone.             --Tennyson.
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   2. To make a hollow sound, as of waves or cannon.
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            Alarm guns booming through the night air. --W.
                                                  Irving.
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   3. To rush with violence and noise, as a ship under a press
      of sail, before a free wind.
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            She comes booming down before it.     --Totten.
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   4. To have a rapid growth in market value or in popular
      favor; to go on rushingly.
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