unseencustom
nounUK /ʌnˈsiːn ˈkʌstəm/
US /ʌnˈsiːn ˈkʌstəm/
A tradition that people follow without knowing why.
The villagers kept the unseencustom of leaving bread at the door each morning.
OTHER MEANINGS
2. A quiet way of doing things that no one talks about.
Sharing snacks after class became an unseencustom among the students.
3. An old practice that has faded from memory but still happens.
The unseencustom of bowing to the old tree survived for generations.
4. A personal habit that others rarely notice.
Her unseencustom was to knock twice before entering any room.