* Formal: The ancient artifact was encased in a glass display case, protecting it from the elements.
* Descriptive: The diamond ring, encased in a velvet box, sparkled under the soft light.
* Figurative: His heart, encased in a shell of grief, felt numb to the world.
* Technical: The circuit board was encased in a protective plastic shell.
* Informal: My phone, encased in a thick rubber case, survived the drop.
You can use "encased" to describe something that is surrounded or enclosed by something else, whether physically or figuratively.