1. Removal of material, especially wastes from the bowels by defecation. 2. SYN: stool (2). 3. Removal of air from a closed vessel; production of a vacuum.
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evac·u·a·tion i-.vak-yə-'wā-shən n
1) the act or process of evacuating
2) something evacuated or discharged
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evac·u·a·tion (e-vak″u-aґshən) 1. an emptying. 2. emptying of the bowels, as by a medicine; called also catharsis and purgation.Medical dictionary. 2011.