When a person or animal excretes waste matter from their body, they get rid of it in faeces, urine, or sweat. Your open pores excrete sweat and dirt + excretion excretions ex·cre·tion the excretion of this drug from the body. to get rid of waste material from your body through your bowels, your skin etc secrete (excretus, past participle of excernere , from cernere )