/ ɪnˈveləp; NAmE / verb
[ vn ] envelop sb/sth (in sth) ( formal ) to wrap sb/sth up or cover them or it completely :
She was enveloped in a huge white towel.
Clouds enveloped the mountain tops.
► en·velop·ment noun [ U ]
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WORD ORIGIN
late Middle English (formerly also as invelop(e) ): from Old French envoluper , from en- in + a second element (also found in develop ) of unknown origin.