The Collaborative International Dictionary of English v.0.48:

Suffuse \Suf*fuse"\, v. t. [imp. & p. p. Suffused; p. pr. &
   vb. n. Suffusing.] [L. suffusus, p. p. of suffundere to
   overspread; sub under + fundere to pour. See Fuse to melt.]
   To overspread, as with a fluid or tincture; to fill or cover,
   as with something fluid; as, eyes suffused with tears; cheeks
   suffused with blushes.
   [1913 Webster]

         When purple light shall next suffuse the skies. --Pope.
   [1913 Webster]

WordNet (r) 3.0 (2006):

suffuse
    v 1: cause to spread or flush or flood through, over, or across;
         "The sky was suffused with a warm pink color" [syn:
         suffuse, perfuse]
    2: to become overspread as with a fluid, a colour, a gleam of
       light; "His whole frame suffused with a cold dew"

Moby Thesaurus II by Grady Ward, 1.0:

54 Moby Thesaurus words for "suffuse":
   bathe, bespread, besprinkle, breathe, brew, color, cover,
   crawl with, creep with, decoct, diffuse, dredge, dye, entincture,
   extend throughout, fill, flavor, flood, flush, honeycomb, imbrue,
   imbue, impregnate, infiltrate, infuse, ingrain, inoculate, instill,
   interject, interpose, introduce, invest, leave no void, leaven,
   mantle, occupy, overrun, overspread, overswarm, penetrate,
   permeate, pervade, pour over, run through, saturate, season,
   spread over, steep, swarm with, teem with, temper, tincture, tinge,
   transfuse