| Excretion 1. (n.) The act of getting rid of waste materials. 2. (n.) That which is excreted; excrement. Thesaurus Entries cleaning out, clearance, clearing, defecation, depletion, discharging cargo, drainage, draining, effusion, egress, elimination, emptying, evacuation, exfiltration, exhausting, exhaustion, external secretion, extravasation, exudation, filtering, filtration, internal secretion, lacrimation, lactation, leaching, lixiviation, off-loading, ooze, oozing, percolating, percolation, removal, secernment, secreta, secretion, seep, seepage, straining, transudation, unloading, venting, voidance, voiding, weep, weeping | ![]() |