groundsheet
Definitions
A waterproof sheet placed on the ground inside or under a tent to provide protection from dampness and dirt.
A protective covering laid on the ground to prevent moisture or debris from reaching an object or person.
Examples
We laid a waterproof groundsheet under our tent to keep the moisture from seeping through the floor.
Make sure to fold the groundsheet carefully before packing it away to prevent any tears in the material.
Synonyms
tarp tarpaulin ground cloth footprint camping mat protective sheet