evacuation

noun

• 1the action of evacuating a person or a place:there were waves of evacuation during the blitz [count noun]:a full-scale evacuation of the city centre

• 2the action of emptying the bowels or another bodily organ: patients with a feeling of incomplete evacuation [count noun]:those who required an evacuation of retained products
• [count noun] a quantity of matter discharged from the bowels or another bodily organ: the evacuations of cholera victims are almost colourless
• technical the action of emptying a container of air, water, or other contents: techniques for evacuation of gas combustion fumes