Noun

1. The act of emptying, clearing of the contents, or discharging.
2. Withdrawal of troops from a town, fortress, etc.
3. Voidance of any matter by the natural passages of the body or by an artificial opening; defecation; also, a diminution of the fluids of an animal body by cathartics, venesection, or other means.
4. That which is evacuated or discharged; especially, a discharge by stool or other natural means.
5. Abolition; nullification.