Source : Webster's Revised Unabridged Dictionary (1913)

Environ \En*vi"ron\, v. t. [imp. & p. p. {Environed}; p. pr. &
   vb. n. {Environing}.] [F. environner, fr. environ about,
   thereabout; pref. en- (L. in) + OF. viron circle, circuit,
   fr. OF. & F. virer to turn, LL. virare to turn up and down,
   topsy-turvy. Cf. {Veer}.]
   To surround; to encompass; to encircle; to hem in; to be
   round about; to involve or envelop.

         Dwelling in a pleasant glade, With mountains round
         about environed.                         --Spenser.

         Environed he was with many foes.         --Shak.

         Environ me with darkness whilst I write. --Donne.