Source : Webster's Revised Unabridged Dictionary (1913)

Forest \For"est\, a.
   Of or pertaining to a forest; sylvan.

   {Forest fly}. (Zo["o]l.)
   (a) One of numerous species of blood-sucking flies, of the
       family {Tabanid[ae]}, which attack both men and beasts.
       See {Horse fly}.
   (b) A fly of the genus {Hippobosca}, esp. {H. equina}. See
       {Horse tick}.

   {Forest glade}, a grassy space in a forest. --Thomson.

   {Forest laws}, laws for the protection of game, preservation
      of timber, etc., in forests.

   {Forest tree}, a tree of the forest, especially a timber
      tree, as distinguished from a {fruit tree}.

Forest \For"est\, v. t.
   To cover with trees or wood.

Forest \For"est\, n. [OF. forest, F. for[^e]t, LL. forestis,
   also, forestus, forestum, foresta, prop., open ground
   reserved for the chase, fr. L. foris, foras, out of doors,
   abroad. See {Foreign}.]
   1. An extensive wood; a large tract of land covered with
      trees; in the United States, a wood of native growth, or a
      tract of woodland which has never been cultivated.

   2. (Eng. Law) A large extent or precinct of country,
      generally waste and woody, belonging to the sovereign, set
      apart for the keeping of game for his use, not inclosed,
      but distinguished by certain limits, and protected by
      certain laws, courts, and officers of its own. --Burrill.

Source : WordNet®

forest
     n 1: the trees and other plants in a large densely wooded area
          [syn: {wood}, {woods}]
     2: land that is covered with trees and shrubs [syn: {woodland},
         {timberland}, {timber}]

forest
     v : establish a forest on previously unforested land; "afforest
         the mountains" [syn: {afforest}]