1. (p. pr. & vb. n.) of Empty.

2. (n.) The act of making empty.

3. (n.) The lees of beer, cider, etc.; yeast.

aspiration bleeding bloodletting broaching cleaning out clearance clearing cupping defecation depletion discharging cargo drafting drainage draining drawing egress elimination evacuation excretion exhausting exhaustion milking off-loading phlebotomy pipetting pumping removal siphoning sucking suction tapping unloading venesection venting voidance voiding