backupsign
nounUK /ˈbækʌpsaɪn/
US /ˈbækʌpsaɪn/
A backupsign is a special mark that helps someone know something is true or safe.
The teacher put a backupsign on my paper to show it was checked.
OTHER MEANINGS
2. A second sign placed behind the first one to give extra support.
They added a backupsign behind the main sign so drivers could see it from far away.
3. A secret signal used to confirm that a plan is still on.
He gave a backupsign with his hand to show the team was ready.
4. A mark on a computer file that shows a safe copy exists.
The program showed a backupsign next to the document name.