From WordNet (r) 3.0 (2006) [wn]:
arrow
n 1: a mark to indicate a direction or relation [syn: arrow,
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
From The Collaborative International Dictionary of English v.0.48 [gcide]:
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.
[1913 Webster]
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.
[1913 Webster]