Source : Webster's Revised Unabridged Dictionary (1913)

Beam \Beam\, n. [AS. be['a]m beam, post, tree, ray of light;
   akin to OFries. b[=a]m tree, OS. b?m, D. boom, OHG. boum,
   poum, G. baum, Icel. ba?mr, Goth. bahms and Gr. ? a growth, ?
   to become, to be. Cf. L. radius staff, rod, spoke of a wheel,
   beam or ray, and G. strahl arrow, spoke of a wheel, ray or
   beam, flash of lightning. ?97. See {Be}; cf. {Boom} a spar.]
   1. Any large piece of timber or iron long in proportion to
      its thickness, and prepared for use.

   2. One of the principal horizontal timbers of a building or
      ship.

            The beams of a vessel are strong pieces of timber
            stretching across from side to side to support the
            decks.                                --Totten.

   3. The width of a vessel; as, one vessel is said to have more
      beam than another.

   4. The bar of a balance, from the ends of which the scales
      are suspended.

            The doubtful beam long nods from side to side.
                                                  --Pope.

   5. The principal stem or horn of a stag or other deer, which
      bears the antlers, or branches.

   6. The pole of a carriage. [Poetic] --Dryden.

   7. A cylinder of wood, making part of a loom, on which
      weavers wind the warp before weaving; also, the cylinder
      on which the cloth is rolled, as it is woven; one being
      called the fore beam, the other the back beam.

   8. The straight part or shank of an anchor.

   9. The main part of a plow, to which the handles and colter
      are secured, and to the end of which are attached the oxen
      or horses that draw it.

   10. (Steam Engine) A heavy iron lever having an oscillating
       motion on a central axis, one end of which is connected
       with the piston rod from which it receives motion, and
       the other with the crank of the wheel shaft; -- called
       also {working beam} or {walking beam}.

   11. A ray or collection of parallel rays emitted from the sun
       or other luminous body; as, a beam of light, or of heat.

             How far that little candle throws his beams !
                                                  --Shak.

   12. Fig.: A ray; a gleam; as, a beam of comfort.

             Mercy with her genial beam.          --Keble.

   13. One of the long feathers in the wing of a hawk; -- called
       also {beam feather}.

   {Abaft the beam} (Naut.), in an arc of the horizon between a
      line that crosses the ship at right angles, or in the
      direction of her beams, and that point of the compass
      toward which her stern is directed.

   {Beam center} (Mach.), the fulcrum or pin on which the
      working beam of an engine vibrates.

   {Beam compass}, an instrument consisting of a rod or beam,
      having sliding sockets that carry steel or pencil points;
      -- used for drawing or describing large circles.

   {Beam engine}, a steam engine having a working beam to
      transmit power, in distinction from one which has its
      piston rod attached directly to the crank of the wheel
      shaft.

   {Before the beam} (Naut.), in an arc of the horizon included
      between a line that crosses the ship at right angles and
      that point of the compass toward which the ship steers.

   {On the beam}, in a line with the beams, or at right angled
      with the keel.

   {On the weather beam}, on the side of a ship which faces the
      wind.

   {To be on her beam ends}, to incline, as a vessel, so much on
      one side that her beams approach a vertical position.

Beam \Beam\, v. t. [imp. & p. p. {Beamed} (?); p. pr. & vb. n.
   {Beaming}.]
   To send forth; to emit; -- followed ordinarily by forth; as,
   to beam forth light.

Beam \Beam\, v. i.
   To emit beams of light.

         He beamed, the daystar of the rising age. --Trumbull.

Source : WordNet®

beam
     v 1: smile radiantly; express joy through one's facial expression
     2: emit light; be bright, as of the sun or a light; "The sun
        shone bright that day"; "The fire beamed on their faces"
        [syn: {shine}]
     3: express with a beaming face or smile; "he beamed his
        approval"
     4: broadcast over the airwaves, as in radio or television; "We
        cannot air this X-rated song" [syn: {air}, {send}, {broadcast},
         {transmit}]
     5: especially of the complexion: show a strong bright color,
        such as red or pink; "Her face glowed when she came out of
        the sauna" [syn: {glow}, {radiate}, {shine}]
     6: experience a feeling of well-being or happiness, as from
        good health or an intense emotion; "She was beaming with
        joy"; "Her face radiated with happiness" [syn: {glow}, {radiate},
         {shine}]

beam
     n 1: a signal transmitted along a narrow path; guides pilots in
          darkness or bad weather [syn: {radio beam}]
     2: long thick piece of wood or metal or concrete, etc., used in
        construction
     3: a column of light (as from a beacon) [syn: {beam of light},
        {light beam}, {ray}, {ray of light}, {shaft}, {shaft of
        light}, {irradiation}]
     4: a group of nearly parallel lines of electromagnetic
        radiation [syn: {ray}, {electron beam}]
     5: (nautical) breadth amidships
     6: a gymnastic apparatus used by women gymnasts [syn: {balance
        beam}]

Source : Free On-Line Dictionary of Computing

beam
     
        [Star Trek Classic's "Beam me up, Scotty!"] To transfer
        {softcopy} of a file electronically; most often in combining
        forms such as "beam me a copy" or "beam that over to his
        site".  Compare {blast}, {snarf}, {BLT}.
     
        [{Jargon File}]