defecate, defecating 1. To void feces from the bowels. 2. To void excrement from the bowels through the anus; have a bowel movement. 3. To become clear of dregs, impurities, etc. 4. To remove (impurities, as in a chemical solution); to clarify. Found on http://www.wordinfo.info/words/index/info/view_unit/806/