ground ‧ sheet /ˈɡraʊndʃiːt/ BrE AmE noun [countable]
British English a piece of material that water cannot pass through which people sleep on when they are camping SYN ground cloth American English
ground ‧ sheet /ˈɡraʊndʃiːt/ BrE AmE noun [countable]
British English a piece of material that water cannot pass through which people sleep on when they are camping SYN ground cloth American English
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012