1575, "to purify," from L. defæcatus, pp. of defæcare "cleanse from dregs, purify," from the phrase de fæce "from dregs," pl. fæces "feces." Excretory sense first recorded 1830 (defecation), Amer.Eng., from Fr.
Main Entry: def·e·cate Variant: or chiefly Britishdef·ae·cate/'def-i-"kAt/ Function: verb Inflected Forms:-cat·ed; -cat·ing transitive senses : to discharge from the anus defecateintransitive senses : to discharge feces fromthe bowels