Source : Webster's Revised Unabridged Dictionary (1913)

Exhale \Ex*hale"\, v. t. [imp. & p. p. {Exaled}, p. pr. & vb.
   n.. {Exaling}.] [L. exhalare; ex out + halare to breathe;
   cf.F. exhaler. Cf. {Inhale}.]
   1. To breathe out. Hence: To emit, as vapor; to send out, as
      an odor; to evaporate; as, the earth exhales vapor;
      marshes exhale noxious effluvia.

            Less fragrant scents the unfolding rose exhales.
                                                  --Pope.

   2. To draw out; to cause to be emitted in vapor; as, the sum
      exhales the moisture of the earth.