in Hinduism, religious ascetic who has renounced the world by performing his or her own funeral and abandoning all claims to social or family standing. Sannyasis, like other sadhus, or holy men, are not cremated but are generally buried in a seated posture of meditation.

Since the 5th century CE, major texts have associated this achievement with the fourth ashram, or stage, of life, but initially it was not so, and it is uncertain what proportion of sadhus have ever actually exemplified this ideal. According to his standard biography, even the philosopher Shankara (Śaṅkara) did not, although he is often regarded as the archetypal sannyasi. The name sannyasi also designates an ascetic who pays particular allegiance to the god Shiva, especially one who belongs to the dashanami (daśnāmī sannyāsin) order said to have been established in the 8th century CE by Shankara.

Among dashanami sannyasis, the highest stage of achievement is recognized by the title paramahamsa (“great swan”). This honorific is usually given only after a probation of at least 12 years as an ascetic and only to those who have achieved full self-knowledge. They are then regarded as free of all worldly rules and duties, including formal religious obligations, and are often expected to worship internally only. Although his own practices were both Shakta (a mixture of Shaivism and folk mother-goddess cults) and deeply devotional, the 19th-century saint Ramakrishna is sometimes regarded as the greatest paramahamsa of modern times, in part because his behaviour transcended any fixed expectation.