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beam  audio  (bm) KEY 

  1. A squared-off log or a large, oblong piece of timber, metal, or stone used especially as a horizontal support in construction.
  2. Nautical
    1. A transverse structural member of a ship's frame, used to support a deck and to brace the sides against stress.
    2. The breadth of a ship at the widest point.
    3. The side of a ship: sighted land off the starboard beam.
  3. Informal The widest part of a person's hips: broad in the beam.
  4. A steel tube or wooden roller on which the warp is wound in a loom.
  5. An oscillating lever connected to an engine piston rod and used to transmit power to the crankshaft.
    1. The bar of a balance from which weighing pans are suspended.
    2. Sports A balance beam.
  6. The main horizontal bar on a plow to which the share, colter, and handles are attached.
  7. One of the main stems of a deer's antlers.
    1. A ray or shaft of light.
    2. A concentrated stream of particles or a similar propagation of waves: a beam of protons; a beam of light.
  8. A radio beam.
beamed, beam·ing, beams
  1. To radiate light; shine.
  2. To smile expansively.
  1. To emit or transmit: beam a message via satellite.
  2. To express by means of a radiant smile: He beamed his approval of the new idea.

on the beam
  1. Following a radio beam. Used of aircraft.
  2. On the right track; operating correctly.

Middle English bem, from Old English bam; see bheu- in Indo-European roots

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