concealedsign
nounUK /kənˈsiːld saɪn/
US /kənˈsiːld saɪn/
A hidden mark that shows something is there.
The detective found a concealed sign on the old map.
OTHER MEANINGS
2. A secret signal used to pass a message without others noticing.
The spy used a concealed sign to warn his friend.
3. A faint trace of something that is hard to see.
There was a concealed sign of water under the dry ground.
4. A coded mark that only certain people understand.
The club members drew a concealed sign on the door.