The Collaborative International Dictionary of English v.0.48:

Pervade \Per*vade"\ (p[~e]r*v[=a]d"), v. t. [imp. & p. p.
   Pervaded; p. pr. & vb. n. Pervading.] [L. pervadere,
   pervasum; per + vadere to go, to walk. See Per-, and
   Wade.]
   1. To pass or flow through, as an aperture, pore, or
      interstice; to permeate.
      [1913 Webster]

            That labyrinth is easily pervaded.    --Blackstone.
      [1913 Webster]

   2. To pass or spread through the whole extent of; to be
      diffused throughout.
      [1913 Webster]

            A spirit of cabal, intrigue, and proselytism
            pervaded all their thoughts, words, and actions.
                                                  --Burke.
      [1913 Webster]

WordNet (r) 3.0 (2006):

pervade
    v 1: spread or diffuse through; "An atmosphere of distrust has
         permeated this administration"; "music penetrated the
         entire building"; "His campaign was riddled with
         accusations and personal attacks" [syn: permeate,
         pervade, penetrate, interpenetrate, diffuse,
         imbue, riddle]

Moby Thesaurus II by Grady Ward, 1.0:

44 Moby Thesaurus words for "pervade":
   bespread, besprinkle, breathe, brew, charge, color, crawl with,
   creep with, decoct, diffuse, dredge, dye, entincture,
   extend throughout, fill, flavor, honeycomb, imbrue, imbue,
   impregnate, infiltrate, infuse, instill, interpenetrate,
   leave no void, leaven, occupy, overrun, overspread, overswarm,
   penetrate, percolate, permeate, run through, saturate, season,
   steep, suffuse, swarm with, teem with, temper, tincture, tinge,
   transfuse