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  1. boom
    IPA[bo͞om]
  2. noun

    • 1. a spar pivoting on the after side of the mast and to which the foot of a vessel's sail is attached, allowing the angle of the sail to be changed.

    • 2. a movable arm over a television or movie set, carrying a microphone or camera:

      a boom mike
    • 3. a long beam extending upward at an angle from the mast of a derrick, for guiding or supporting objects being moved or suspended.

    • 4. a floating beam used to contain oil spills or to form a barrier across the mouth of a harbor or river.

    • 5. a retractable tube for inflight transfer of fuel from a tanker airplane to another airplane.

  3. Variation

    • n.: noun: boom, plural noun: booms

    • noun

      a loud, deep, resonant sound:

      the characteristic resonant call of the bittern:

    • verb

      make a loud, deep, resonant sound:

      say in a loud, deep, resonant voice:

    • noun

      a period of great prosperity or rapid economic growth:
    • verb

      enjoy a period of great prosperity or rapid economic growth:
    • noun

      a loud, deep, resonant sound:

      the characteristic resonant cry of the bittern:

    • verb

      make a loud, deep, resonant sound:

      say in a loud, deep, resonant voice:

    • noun

      a pivoted spar to which the foot of a vessel's sail is attached, allowing the angle of the sail to be changed.

      a movable arm over a television or film set, carrying a microphone or camera:

    • noun

      a period of great prosperity or rapid economic growth:
    • verb

      experience a period of great prosperity or rapid economic growth:
    • noun

      a town undergoing rapid growth due to sudden prosperity:
    • noun

      a loud explosive noise caused by the shock wave from an aircraft traveling faster than the speed of sound.
    • noun

      a spar run out forward as an extension of the bowsprit.
    • noun

      a temporary marked increase in the birth rate, especially the one following World War II:
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