E*vac`u*a"tion (?), n. [L. evacuatio: cf. F. 'evacuation.]
The act of emptying, clearing of the contents, or discharging
. Specifically: (a) Mil.
Withdrawal of troops from a town, fortress, etc.
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.
That which is evacuated or discharged; especially, a discharge by stool or other natural means.
Evacuation day, the anniversary of the day on which the British army evacuated the city of New York, November 25, 1783.
© Webster 1913.