backupcover

noun
UK /ˈbækʌpˌkʌvə/
US /ˈbækʌpˌkʌvər/

A backupcover is a spare cover that you keep in case the first one gets lost or broken.

She packed a backupcover for her phone so it would still be protected if the first one cracked.


OTHER MEANINGS

2. A second protective layer placed behind the main cover for extra safety.

The tent had a backupcover underneath to keep the rain out.

3. A person or thing that provides cover for someone else if the first fails.

The goalie acted as a backupcover when the main defender slipped.

4. An additional insurance policy that covers what the first policy does not.

They bought a backupcover in case the main plan did not pay out.