'Evacuation' definitions:

Definition of 'evacuation'

noun

The act of removing the contents of something [syn: emptying, voidance, evacuation]

noun

The act of evacuating; leaving a place in an orderly fashion; especially for protection

noun

The bodily process of discharging waste matter [syn: elimination, evacuation, excretion, excreting, voiding]

From: GCIDE

Evacuation \E*vac`u*a"tion\, n. [L. evacuatio: cf. F. ['e]vacuation.]
1. The act of emptying, clearing of the contents, or discharging. Specifically: (a) (Mil.) Withdrawal of troops from a town, fortress, etc. (b) (Med.) 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. [1913 Webster]
2. That which is evacuated or discharged; especially, a discharge by stool or other natural means. --Quincy. [1913 Webster]
3. Abolition; nullification. [Obs.] --Hooker. [1913 Webster]
Evacuation day, the anniversary of the day on which the British army evacuated the city of New York, November 25, 1783. [1913 Webster]