Source : Webster's Revised Unabridged Dictionary (1913)

Flash \Flash\, v. t.
   1. To send out in flashes; to cause to burst forth with
      sudden flame or light.

            The chariot of paternal Deity, Flashing thick
            flames.                               --Milton.

   2. To convey as by a flash; to light up, as by a sudden flame
      or light; as, to flash a message along the wires; to flash
      conviction on the mind.

   3. (Glass Making) To cover with a thin layer, as objects of
      glass with glass of a different color. See {Flashing}, n.,
      3
      (b) .

   4. To trick up in a showy manner.

            Limning and flashing it with various dyes. --A.
                                                  Brewer.

   5. [Perh. due to confusion between flash of light and plash,
      splash.] To strike and throw up large bodies of water from
      the surface; to splash. [Obs.]

            He rudely flashed the waves about.    --Spenser.

   {Flashed glass}. See {Flashing}, n., 3.