A bhikkhunī (𑀪𑀺𑀓𑁆𑀔𑀼𑀦𑀻) or bhikṣuṇī (भिक्षुणी) is a fully ordained female in Buddhist monasticism. Bhikkhunis live by the Vinaya, a set of either 311 Theravada, 348 Dharmaguptaka, or 364 Mulasarvastivada school rules. Until recently, the lineages of female monastics only remained in Mahayana Buddhism and thus were prevalent in countries such as China, Korea, Taiwan, and Vietnam, while a few women have taken the full monastic vows in the Theravada and Vajrayana schools. The official lineage of Tibetan Buddhist bhikkhunis recommenced on 23 June 2022 in Bhutan when 144 nuns were fully ordained.
According to the Buddhist Canon, women are as capable of reaching enlightenment as men. The Canon describes that the order of bhikkhunis was first created by the Buddha at the specific request of his aunt and foster-mother Mahapajapati Gotami, who became the first ordained bhikkhuni. A famous work of the early Buddhist schools is the Therigatha, a collection of poems by elder nuns about enlightenment that was preserved in the Pāli Canon.
The canon describes extra vows required for women to be ordained as bhikkhunīs. The controversial Eight Garudhammas whose authorship cannot be traced to the Buddha, mandates the bhikkhunī order as subordinate to and reliant upon the bhikkhu (monk) order. There are 253 Vinaya precepts for bhikkus. In places where the bhikkhuni lineage was historically missing or has died out, due to hardship, alternative forms of renunciation have developed.
In Tibetan Buddhism, women first officially take refuge vows as a layperson. Then the renunciate vows of rabtu jungwa (rab-jung) are given before the getsulma (Tib. novice) ordination vows are given. After these, full bhikkhuni ordination may be given.
Some Theravadin women may choose to take an informal and limited set of vows similar to the historical vows of the getsulma (Skt. sāmaṇerī), like the maechi of Thailand and thilashin of Myanmar.
The tradition of the ordained monastic community (sangha) began with the Buddha, who established an order of bhikkhus (monks).