The Collaborative International Dictionary of English v.0.48:

Fumigate \Fu"mi*gate\, v. t. [imp. & p. p. Fumigated; p. pr. &
   vb. n. Fumigating.] [L. fumigate, p. p. of fumigare to
   fumigate, fr. fumus smoke. See Fume, n.]
   1. To apply smoke to; to expose to smoke or vapor; to purify,
      or free from infection, by the use of smoke or vapors.
      [1913 Webster]

   2. To smoke; to perfume. --Dryden.
      [1913 Webster]

WordNet (r) 3.0 (2006):

fumigate
    v 1: treat with fumes, expose to fumes, especially with the aim
         of disinfecting or eradicating pests [syn: fumigate,
         fume]