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]