Facing (noun)

1. A surface or material covering the front or outer surface of an object, typically for protection, decoration, or improved appearance.
2. A similar material or surface covering the inside of an object or structure, typically to line or reinforce it.

Origin:

The word comes from the old french word 'facer', which means 'to face' or 'to make a face for'.

Examples:

1. The facing of the fireplace was made of black marble.
2. The facing of the jacket was made of a waterproof material.
3. The facing on the wall was peeling off due to age.
4. The facing of the building was painted a bright yellow color.
5. The facing of the book cover was made of high quality leather.