Source : Webster's Revised Unabridged Dictionary (1913)

Arrow \Ar"row\, n. [OE. arewe, AS. arewe, earh; akin to Icel.
   ["o]r, ["o]rvar, Goth. arhwazna, and perh. L. arcus bow. Cf.
   {Arc}.]
   A missile weapon of offense, slender, pointed, and usually
   feathered and barbed, to be shot from a bow.

   {Broad arrow}.
   (a) An arrow with a broad head.
   (b) A mark placed upon British ordnance and government
       stores, which bears a rude resemblance to a broad
       arrowhead.

Source : WordNet®

arrow
     n 1: a mark to indicate a direction or relation [syn: {pointer}]
     2: a projectile with a straight thin shaft and an arrowhead on
        one end and stabilizing vanes on the other; intended to be
        shot from a bow