In Hinduism, the tilaka or tilak (Sanskrit: तिलक tilaka) is a mark worn on the forehead and other parts of the body. Tilaka may be worn on a daily basis or for special religious occasions only, depending on different customs.
The tilaka is decorative and is also an identifying mark. Worn by a priest, ascetic, or worshiper it shows which Hindu tradition he follows. It may be made with sandalwood paste, ashes (vibhuti), kumkum, sindhoor, clay, or another substance. The pastes are applied to the forehead and in some cases to the upper part of the head. Tilakas are also discussed in the Vasudeva Upanishad.