securitymark
nounUK /sɪˈkjʊərəti mɑːk/
US /sɪˈkjʊrəti mɑːrk/
A security mark is a special sign that shows something is real and safe.
The guard checked the security mark on the ticket before letting us in.
OTHER MEANINGS
2. A hidden or visible mark used to prove an object has not been changed or copied.
The banknote has a security mark that glows under special light.
3. A symbol placed on a product to show it meets safety rules.
Look for the security mark on the toy box to know it is safe for kids.
4. A digital tag that helps a computer check if a file is genuine.
The app would not open because its security mark was missing.
5. A small sign on a package that shows it was sealed properly.
If the security mark is broken, do not eat what is inside.