tonˈsure /-shər/ noun

1. The act or mode of clipping the hair, or of shaving the head
2. (in the Roman Catholic and Eastern Churches) the shaving or cutting of part of the hair of the head (typically that on the crown) on entering the priesthood or a monastic order
3. The shaven part
4. The state of being shaven

To give a tonsure to

tonˈsured adjective

1. (of eg a priest) having the crown of the head shaven
2. Shaven
3. Bald
4. Clipped