Source : Webster's Revised Unabridged Dictionary (1913)

Hoary \Hoar"y\, a.
   1. White or whitish. ``The hoary willows.'' --Addison.

   2. White or gray with age; hoar; as, hoary hairs.

            Reverence the hoary head.             --Dr. T.
                                                  Dwight.

   3. Hence, remote in time past; as, hoary antiquity.

   4. Moldy; mossy; musty. [Obs.] --Knolles.

   5. (Zo["o]l.) Of a pale silvery gray.

   6. (Bot.) Covered with short, dense, grayish white hairs;
      canescent.

   {Hoary bat} (Zo["o]l.), an American bat ({Atalapha cinerea}),
      having the hair yellowish, or brown, tipped with white.