interior
n. countable C1 Advanced Oxford US //ˌɪnˈtɪɹiɝ// UK //ɪntˈiəɹɪɐ// in·te·ri·or
n. the inside part of something, like a building, a car, or a room. It describes the space within the walls or boundaries of an object.
n. the internal part or inside of a structure, container, or geographic area. Often used in contrast with the exterior or the outer surface.
The interior of the house is painted bright white.
Designers spent months selecting the leather and wood finishes for the luxury car's interior.
While the building's facade remains strictly traditional, the interior has been completely gutted and replaced with a minimalist, open-plan office space.
Usage
Often used with the preposition 'of' to specify the object being described.