(1):

(v. i.) To excrete matter through the skin; esp., to excrete fluids through the pores of the skin; to sweat.

(2):

(v. i.) To be evacuated or excreted, or to exude, through the pores of the skin; as, a fluid perspires.

(3):

(v. t.) To emit or evacuate through the pores of the skin; to sweat; to excrete through pores.