Bora is an initiation ceremony of the Aboriginal and Torres Strait Islander people of Australia, descended from groups that existed in Australia and surrounding islands prior to European colonisation. The word "bora" also refers to the site on which the initiation is performed. At such a site, boys, having reached puberty, achieve the status of men. The initiation ceremony differs from Aboriginal culture to culture, but often, at a physical level, involved scarification, circumcision, subincision and, in some regions, also the removal of a tooth. During the rites, the youths who were to be initiated were taught traditional sacred songs, the secrets of the tribe's religious visions, dances, and traditional lore. Many different clans would assemble to participate in an initiation ceremony. Women and children were not permitted to be present at the sacred bora ground where these rituals were undertaken.
The word Bora was originally taken from the Gamilaraay language spoken by the Kamilaroi people who lived in the region north of the Hunter Valley in New South Wales to southern Queensland. It was then adorted broadly to describe similar ritual sites and the ceremonies associated with them performed throughout Eastern Australia. Many other terms exist across Australia to denote similar initiatory rites on a ceremonial ground, such as burbung (Wiradjuri), and kuringal (Yuin). The specific word is said to come from the belt worn by initiated men.
The appearance of the site varies among cultures, but it is often associated with stone arrangements, rock engravings, or other art works. In the bora rites of southeastern Australia, two circles were drawn, connected by a pathway, a schema which appears to replicate a sky Bora, or the configuration of a series of positions in the Milky Way. Typically, bora ground comprised a larger circle with a diameter of between 20–30 metres, and a smaller ring around 10–15 metres in diameter. The former was a more public space while the latter was sacred, and restricted to male participants who were either the instructing male elders or the initiands.