noun, verb, -sured, -sur⋅ing.| 1. | the act of cutting the hair or shaving the head. |
| 2. | the shaving of the head or of some part of it as a religious practice or rite, esp. in preparation for entering the priesthood or a monastic order. |
| 3. | the part of a cleric's head, usually the crown, left bare by shaving the hair. |
| 4. | the state of being shorn. |
| 5. | to confer the ecclesiastical tonsure upon. |
| 6. | to subject to tonsure. |
