layer
Definitions
A sheet, quantity, or thickness of material, typically one of several, covering a surface or body.
A person or thing that lays something, such as a bricklayer or a bird that produces eggs.
A level or stratum in a system, organization, or computer software architecture.
Examples
The baker added a thick layer of frosting to the top of the cake.
You should wear an extra layer of clothing to stay warm in this cold weather.