En·vi·ron v. t. [imp. & p. p. Environed p. pr. & vb. n. Environing.] 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.