Sati (also spelled suttee) is an obsolete Hindu funeral custom where a widow immolates herself on her husband's pyre; or commits suicide in another fashion shortly after her husband's death.

However sati could take the form of widow burial whenever the caste or community of the deceased called for it; as for example with the Jogi weavers of Bengal; or with the Jasnathis of Rajasthan; a lost branch of Ismaili Muslims who have reconverted to Hinduism.