Webster's Revised Unabridged Dictionary · 1913

Envelop

Envelop , transitive verb

[Old English envolupen, envolipen, Old French envoluper, envoleper, French envelopper; pref. en- (Latin in) + voluper, voleper. See Develop.]

To put a covering about; to wrap up or in; to inclose within a case, wrapper, integument or the like; to surround entirely; as, to envelop goods or a letter; the fog envelops a ship.
Nocturnal shades this world envelop. — J. Philips