A pratyekabuddha or paccekabuddha (Sanskrit and Pali, respectively), literally "a lone buddha", "a buddha on their own", "a private buddha", or "a silent buddha", is one of three types of enlightened beings according to some schools of Buddhism. The other two buddha types are the arhat and the sammāsambuddha (Sanskrit samyaksambuddha).
Pratyekabuddhas are said to achieve enlightenment on their own, without the use of teachers or guides, according to some traditions by seeing and understanding dependent origination. They are said to arise only in ages where there is no Buddha and the Buddhist teachings (Sanskrit: dharma; Pāli: dhamma) are lost. "The idea of a Paccekabuddha … is interesting, as much as it implies that even when the four truths are not preached they still exist and can be discovered by anyone who makes the necessary mental and moral effort". Many may arise at a single time.
According to the Theravada school, paccekabuddhas ("one who has attained to supreme and perfect insight, but who dies without proclaiming the truth to the world") are unable to teach the Dhamma, which requires the omniscience and supreme compassion of a sammāsambuddha, and even he hesitates to attempt to teach. Paccekabuddhas give moral teachings but do not bring others to enlightenment. They leave no sangha as a legacy to carry on the Dhamma.
In the fourth-century Mahayana abhidharma work, the Abhidharma-samuccaya, Asaṅga describes followers of the Pratyekabuddhayāna as those who dwell alone like a rhinoceros or as solitary conquerors (Skt. pratyekajina) living in small groups. Here they are characterized as utilizing the same canon of texts as the śrāvakas, the Śrāvaka Piṭaka, but having a different set of teachings, the "Pratyekabuddha Dharma".
A very early sutra, the Rhinoceros Sutra, uses the exact metaphor of Asaṅga. The Rhinoceros Sutra is one of the Gandhāran Buddhist texts, which are the oldest Buddhist texts known. This text is also present in the Pāli Canon; in the Sutta Pitaka, a Pali Rhinoceros Sutta is the third sutta in the Khuddaka Nikaya's Sutta Nipata's first chapter (Sn 1.3).
Pratyekabuddhas (e.g. Darīmukha J.378, Sonaka J.529) appear as teachers of Buddhist doctrine in pre-Buddhist times in several of the Jataka tales.