The Collaborative International Dictionary of English v.0.48:

Lusterless \Lus"ter*less\, Lustreless \Lus"tre*less\, a.
   Destitute of luster; dim; dull.
   [1913 Webster]

WordNet (r) 3.0 (2006):

lusterless
    adj 1: lacking brilliance or vitality; "a dull lackluster life";
           "a lusterless performance" [syn: lackluster,
           lacklustre, lusterless, lustreless]
    2: lacking luster or shine; "staring with lackluster eyes";
       "lusterless hair" [syn: lackluster, lacklustre,
       lusterless, lustreless]

Moby Thesaurus II by Grady Ward, 1.0:

63 Moby Thesaurus words for "lusterless":
   achromatic, achromic, anemic, ashen, ashy, bled white, blind,
   bloodless, cadaverous, chloranemic, colorless, dead, deadened,
   deadly pale, deathly pale, dim, dimmed, dingy, discolored, drab,
   dull, etiolated, exsanguinated, exsanguine, exsanguineous, faded,
   faint, fallow, flat, ghastly, gray, haggard, hueless, hypochromic,
   lackluster, leaden, lifeless, livid, lurid, mat, mealy, muddy,
   muted, neutral, pale, pale as death, pale-faced, pallid, pasty,
   prosaic, prosy, sallow, sickly, somber, tallow-faced, toneless,
   uncolored, wan, washed-out, waxen, weak, whey-faced, white