personalsign
nounUK /ˈpɜːsənl saɪn/
US /ˈpɜːrsənl saɪn/
A personal sign is a special mark or signal that belongs to just one person.
She drew a personal sign on her notebook so everyone would know it was hers.
OTHER MEANINGS
2. A gesture or signal used by one person to communicate privately with someone.
He gave a personal sign to his friend across the room.
3. A distinctive feature that identifies a particular person.
Her bright red hat became a personal sign at every game.
4. A handwritten mark used instead of a full name on a document.
He put his personal sign at the bottom of the letter.