Source : Webster's Revised Unabridged Dictionary (1913)

Hazel \Ha"zel\, a.
   1. Consisting of hazels, or of the wood of the hazel;
      pertaining to, or derived from, the hazel; as, a hazel
      wand.

            I sit me down beside the hazel grove. --Keble.

   2. Of a light brown color, like the hazelnut. ``Thou hast
      hazel eyes.'' --Shak.

Hazel \Ha"zel\, n. [OE. hasel, AS. h[ae]sel; akin to D.
   hazelaar, G. hazel, OHG. hasal, hasala, Icel. hasl, Dan & Sw.
   hassel, L. corylus, for cosylus.]
   1. (Bot.) A shrub or small tree of the genus {Corylus}, as
      the {C. avellana}, bearing a nut containing a kernel of a
      mild, farinaceous taste; the filbert. The American species
      are {C. Americana}, which produces the common hazelnut,
      and {C. rostrata}. See {Filbert}. --Gray.

   2. A miner's name for freestone. --Raymond.

   {Hazel earth}, soil suitable for the hazel; a fertile loam.
      

   {Hazel grouse} (Zo["o]l.), a European grouse ({Bonasa
      betulina}), allied to the American ruffed grouse.

   {Hazel hoe}, a kind of grub hoe.

   {Witch hazel}. See {Witch-hazel}, and {Hamamelis}.

Source : WordNet®

hazel
     adj : of a light brown or yellowish brown color

hazel
     n 1: Australian tree grown especially for ornament and its
          fine-grained wood and bearing edible nuts [syn: {hazel
          tree}, {Pomaderris apetala}]
     2: the fine-grained wood of a hazelnut tree (genus Corylus) and
        the hazel tree (Australian genus Pomaderris)
     3: any of several shrubs or small trees of the genus Corylus
        bearing edible nuts enclosed in a leafy husk [syn: {hazelnut},
         {hazelnut tree}]