Definitions

1. noun

A layer or stratum of soil, rock, or other material, typically forming part of the Earth’s surface or a geological formation.

“The geologist studied the various substrats of the area to understand its geological history.”

2. noun

A substrate in chemistry, such as a material used as a base for a chemical reaction.

“The catalyst was attached to the substrate before the chemical reaction began.”

3. noun

A surface or medium on which something is printed, written, or applied.

“The ink adhered poorly to the substrate of the cheap paper.”