encasement

or in·case·ment

[en-keys-muh nt or in-keys-muh nt]

noun

the act of encasing.
the state of being encased.
something that encases; case.

Origin of encasement

First recorded in 1735–45; encase + -ment
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019