The Collaborative International Dictionary of English v.0.48:

disregard \dis`re*gard"\, v. t. [imp. & p. p. disregarded; p.
   pr. & vb. n. disregarding.]
   Not to regard; to pay no heed to; to omit to take notice of;
   to neglect to observe; to slight as unworthy of regard or
   notice; as, to disregard the admonitions of conscience.
   [1913 Webster]

         Studious of good, man disregarded fame.  --Blackmore.
   [1913 Webster]

WordNet (r) 3.0 (2006):

disregarded
    adj 1: not noticed inadvertently; "her aching muscles forgotten
           she danced all night"; "he was scolded for his forgotten
           chores" [syn: disregarded, forgotten]