The Collaborative International Dictionary of English v.0.48:

Disrespect \Dis`re*spect"\, n.
   Want of respect or reverence; disesteem; incivility;
   discourtesy.
   [1913 Webster]

         Impatience of bearing the least affront or disrespect.
                                                  --Pope.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Disrespect \Dis`re*spect"\, v. t.
   To show disrespect to.
   [1913 Webster]

         We have disrespected and slighted God.   --Comber.
   [1913 Webster]

WordNet (r) 3.0 (2006):

disrespect
    n 1: an expression of lack of respect [syn: disrespect,
         discourtesy]
    2: a disrespectful mental attitude [ant: esteem, regard,
       respect]
    3: a manner that is generally disrespectful and contemptuous
       [syn: contempt, disrespect]
    v 1: show a lack of respect for [ant: abide by, honor,
         honour, observe, respect]
    2: have little or no respect for; hold in contempt [syn:
       disrespect, disesteem] [ant: esteem, prise, prize,
       respect, value]

Moby Thesaurus II by Grady Ward, 1.0:

59 Moby Thesaurus words for "disrespect":
   ban, be disrespectful, be overfamiliar with, blackball,
   blackballing, boldness, cheek, complaint, dim view, disagreement,
   disappointment, disapprobation, disapproval, discontent,
   discontentedness, discontentment, discourtesy, disenchantment,
   disesteem, disfavor, disgruntlement, disillusion, disillusionment,
   disparage, displeasure, dissatisfaction, dissent, distaste,
   exclusion, hardihood, impertinence, impoliteness, impudence,
   incivility, indecorum, indignation, insolence, irreverence,
   low estimation, low opinion, make free with, not respect,
   objection, opposition, opposure, ostracism, protest, rank low,
   rejection, ridicule, rudeness, show disrespect for, take a liberty,
   take liberties with, thumbs-down, treat with disrespect,
   trifle with, unhappiness, unmannerliness