Prostration is the gesture of placing one's body in a reverentially or submissively prone position. Typically prostration is distinguished from the lesser acts of bowing or kneeling by involving a part of the body above the knee, especially the hands, touching the ground.

Major world religions employ prostration as an act of submissiveness or worship to a supreme being or other worshiped entity (i.e. God), as in the metanoia in Christian prayer used in the Eastern Orthodox and Oriental Orthodox Churches and the sajdah of the Islamic prayer, salat. In various cultures and traditions, prostrations are similarly used to show respect to rulers, civil authorities and social elders or superiors, as in the Chinese kowtow or Ancient Greek proskynesis. The act has often traditionally been an important part of religious, civil and traditional rituals and ceremonies, and remains in use in many cultures.