资料来源 : Webster's Revised Unabridged Dictionary (1913)

Flash \Flash\, n.; pl. {Flashes}.
   1. A sudden burst of light; a flood of light instantaneously
      appearing and disappearing; a momentary blaze; as, a flash
      of lightning.

   2. A sudden and brilliant burst, as of wit or genius; a
      momentary brightness or show.

            The flash and outbreak of a fiery mind. --Shak.

            No striking sentiment, no flash of fancy. --Wirt.

   3. The time during which a flash is visible; an instant; a
      very brief period.

            The Persians and Macedonians had it for a flash.
                                                  --Bacon.

   4. A preparation of capsicum, burnt sugar, etc., for coloring
      and giving a fictious strength to liquors.

   {Flash light}, or {Flashing light}, a kind of light shown by
      lighthouses, produced by the revolution of reflectors, so
      as to show a flash of light every few seconds, alternating
      with periods of dimness. --Knight.

   {Flash in the pan}, the flashing of the priming in the pan of
      a flintlock musket without discharging the piece; hence,
      sudden, spasmodic effort that accomplishes nothing.