The Collaborative International Dictionary of English v.0.48:

Undefiled \Undefiled\
   See defiled.

WordNet (r) 3.0 (2006):

undefiled
    adj 1: free from stain or blemish [syn: immaculate,
           undefiled]
    2: (of language) not having its purity or excellence debased;
       "uncorrupted English"; "learn to speak pure English
       undefiled"- Van Wyck Brooks [syn: uncorrupted, undefiled]

Moby Thesaurus II by Grady Ward, 1.0:

117 Moby Thesaurus words for "undefiled":
   Christian, angelic, blameless, bleached, blotless, bright, chaste,
   childlike, clean, cleanly, clear, creditable, dainty, decent,
   dirt-free, dovelike, erect, estimable, ethical, fair, fastidious,
   faultless, fresh, full of integrity, good, guiltless, high-minded,
   high-principled, highly respectable, honest, honorable, immaculate,
   impeccable, in the clear, incorrupt, innocent, inviolate,
   irreproachable, just, kosher, lamblike, law-abiding, law-loving,
   law-revering, manly, modest, moral, noble, nonpolluted, not guilty,
   of cleanly habits, offenseless, prelapsarian, principled, pristine,
   pure, pure in heart, purehearted, reproachless, reputable,
   respectable, right, right-minded, righteous, ritually pure,
   sans reproche, sexually innocent, shiny, sinless, smut-free,
   smutless, snowy, spotless, stainless, sterling, sweet, tahar,
   taintless, true-dealing, true-devoted, true-disposing, true-souled,
   true-spirited, truehearted, tubbed, unadulterated, unbesmirched,
   unblemished, unblotted, uncorrupt, uncorrupted, unfallen,
   unimpeachable, unlapsed, unmuddied, unpolluted, unsmirched,
   unsmudged, unsoiled, unspotted, unstained, unsullied, untainted,
   untarnished, untouched by evil, upright, uprighteous, upstanding,
   virtuous, well-scrubbed, well-washed, white, whitened,
   with clean hands, without reproach, worthy, yeomanly