Definition of evacuation

• n. - The act of emptying, clearing of the contents, or discharging.
• n. - Withdrawal of troops from a town, fortress, etc.
• n. - 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.
• n. - That which is evacuated or discharged; especially, a discharge by stool or other natural means.
• n. - Abolition; nullification.