mysterymark
nounUK /ˈmɪstəri mɑːk/
US /ˈmɪstəri mɑːrk/
A mysterymark is a special sign that makes you wonder what it means.
The detective found a mysterymark scratched on the old wooden door.
OTHER MEANINGS
2. A hidden mark used in games to show a secret spot.
Each player drew a mysterymark on the map to hide the treasure.
3. A strange spot that appears for no clear reason.
A mysterymark showed up on the window after the rain.
4. A coded sign that only certain people can understand.
The club members used a mysterymark to recognize each other.