Tonsure (ˈtɒnʃər) is the practice of cutting or shaving some or all of the hair on the scalp as a sign of religious devotion or humility. The term originates from the Latin word tonsura (meaning "clipping" or "shearing") and referred to a specific practice in medieval Catholicism, abandoned by papal order in 1972. Tonsure can also refer to the secular practice of shaving all or part of the scalp to show support or sympathy, or to designate mourning. Current usage more generally refers to cutting or shaving for monks, devotees, or mystics of any religion as a symbol of their renunciation of worldly fashion and esteem.
Tonsure is still a traditional practice in Catholicism by specific religious orders (with papal permission). It is also commonly used in the Eastern Orthodox Church for newly baptised members and is frequently used for Buddhist novices, monks, and nuns. The complete shaving of one's head bald, or just shortening the hair, exists as a traditional practice in Islam after completion of the Hajj and is also practised by a number of Hindu religious orders.
Tonsure was not widely known in antiquity. There were three forms of tonsure known in the 7th and 8th centuries:
The Oriental consisted of shaving the whole head. This was observed in the Eastern churches, including the Eastern Orthodox Church and the Eastern Catholic Churches. Hence Theodore of Tarsus, who had acquired his learning in Byzantine Asia Minor and bore this tonsure, had to allow his hair to grow for four months before he could be tonsured after the Roman fashion, and then ordained Archbishop of Canterbury by Pope Vitalian in 668.
The Celtic tonsure, the exact shape of which is unclear from the sources, but in some way involved shaving the head from ear to ear. The shape may have been semicircular, arcing forward from a line between the ears, but another popular suggestion, less borne out in the sources, proposes that the entire forehead was shaved back to the ears. More recently a triangular shape, with one point at the front of the head going back to a line between the ears, has been suggested.