The Collaborative International Dictionary of English v.0.48:
Forest \For"est\, a.
Of or pertaining to a forest; sylvan.
Forest fly. (Zool.)
(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
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.