[ih-vak-yoo-ey-shuh n]
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  1. the act or process of evacuating, or the condition of being evacuated; discharge or expulsion, as of contents.
  2. Physiology. discharge, as of waste matter through the excretory passages, especially from the bowels.
  3. something evacuated or discharged.
  4. the removal of persons or things from an endangered area.
  5. clearance by removal of troops, equipment, etc.
  6. the withdrawal or removal of troops, civilians, etc.

Origin of evacuation

1350–1400; Middle English evacuacioun < Late Latin ēvacuātion- (stem of ēvacuātiō). See evacuate, -ion
Related formse·vac·u·a·tive [ih-vak-yoo-ey-tiv] /ɪˈvæk yuˌeɪ tɪv/, adjectivenon·e·vac·u·a·tion, nounre·e·vac·u·a·tion, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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Historical Examples of evacuation

Word Origin and History for evacuation

c.1400, "discharge from the body" (originally mostly of blood), from Old French évacuation and directly from Late Latin evacuationem (nominative evacuatio), noun of action from past participle stem of evacuare (see evacuate).

Online Etymology Dictionary, © 2010 Douglas Harper

evacuation in Medicine


  1. Discharge of waste materials from the excretory passages of the body, especially from the bowels.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.