The Collaborative International Dictionary of English v.0.48:

Exhale \Ex*hale"\ ([e^]ks*h[=a]l" or [e^]gz*[=a]l"), 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.
      [1913 Webster]

            Less fragrant scents the unfolding rose exhales.
                                                  --Pope.
      [1913 Webster]

   2. To draw out; to cause to be emitted in vapor; as, the sun
      exhales the moisture of the earth.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Exhale \Ex*hale"\, v. i.
   To rise or be given off, as vapor; to pass off, or vanish.
   [1913 Webster]

         Their inspiration exhaled in elegies.    --Prescott.
   [1913 Webster]

WordNet (r) 3.0 (2006):

exhale
    v 1: expel air; "Exhale when you lift the weight" [syn:
         exhale, expire, breathe out] [ant: breathe in,
         inhale, inspire]
    2: give out (breath or an odor); "The chimney exhales a thick
       smoke" [syn: exhale, give forth, emanate]

Moby Thesaurus II by Grady Ward, 1.0:

78 Moby Thesaurus words for "exhale":
   aerate, aerify, atomize, be aromatic, be redolent of, blow,
   blow off, breathe, breathe hard, breathe in, breathe out,
   carbonate, chlorinate, cough, discharge, distill, eject, emanate,
   emit, emit a smell, etherify, etherize, evacuate, evaporate,
   exhaust, expel, expire, fluidize, fractionate, fume, fumigate,
   gasify, gasp, give forth, give off, give out, give vent to, gulp,
   hack, hiccup, huff, hydrogenate, inhale, inspire, issue forth,
   let out, open the floodgates, open the sluices, oxygenate, pant,
   pass off, perfume, puff, reek, respire, send out, sigh, smell,
   smell of, smoke, sneeze, sniff, sniffle, snore, snort, snuff,
   snuffle, spray, steam, stink, sublimate, sublime, throw off, vapor,
   vaporize, volatilize, wheeze, yield an odor