lining
n. C / U B2 Upper Intermediate US //ˈɫaɪnɪŋ// UK //lˈaɪnɪŋ// lin·ing
n. a layer of material on the inside of something, like a coat or a bag, to make it warmer or stronger.
n. a layer of fabric or other material covering the inner surface of something, typically a garment or container. Often serves to provide structural reinforcement, insulation, or a smoother finish.
The silk lining of this jacket feels very soft.
She chose a bright red lining for her new winter coat to add a hidden splash of color.
The silver lining of the clouds provided a stark contrast to the darkening landscape, reminding the travelers that the storm might soon pass.
Usage
Uncountable when referring to the material itself; countable when referring to a specific layer in an object.