Source : Webster's Revised Unabridged Dictionary (1913)

Pervade \Per*vade"\, 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.

            That labyrinth is easily pervaded.    --Blackstone.

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

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

Source : WordNet®

pervading
     adj : spread throughout; "a pervasive anxiety overshadows the
           triumphs of individuals" [syn: {pervasive}]