The Collaborative International Dictionary of English v.0.48:

Perspire \Per*spire"\, v. t.
   To emit or evacuate through the pores of the skin; to sweat;
   to excrete through pores.
   [1913 Webster]

         Firs . . . perspire a fine balsam of turpentine.
                                                  --Smollett.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Perspire \Per*spire"\, 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]

WordNet (r) 3.0 (2006):

perspire
    v 1: excrete perspiration through the pores in the skin;
         "Exercise makes one sweat" [syn: sweat, sudate,
         perspire]