v. i. [ imp. & p. p. Perspired p. pr. & vb. n. Perspiring. ] [ L. perspirare to breathe through; per + spirare. See Per-, and Spirit. ] 1. (Physiol.) To excrete matter through the skin; esp., to excrete fluids through the pores of the skin; to sweat. [ 1913 Webster ]
2. To be evacuated or excreted, or to exude, through the pores of the skin; as, a fluid perspires. [ 1913 Webster ]