evacuation Meaning, Definition & Usage

  1. noun the act of removing the contents of something
    emptying; voidance.
  2. noun the act of evacuating; leaving a place in an orderly fashion; especially for protection
  3. noun the bodily process of discharging waste matter
    elimination; excretion; excreting; voiding.

WordNet

E*vac`u*a"tion noun
Etymology
L. evacuatio: cf. F. évacuation.
Definitions
  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.
  2. That which is evacuated or discharged; especially, a discharge by stool or other natural means. Quincy.
  3. Abolition; nullification. Obs. Hooker.

Webster 1913