The Collaborative International Dictionary of English v.0.48:

Slight \Slight\, v. t. [imp. & p. p. Slighted; p. pr. & vb. n.
   Slighting.]
   To disregard, as of little value and unworthy of notice; to
   make light of; as, to slight the divine commands. --Milton.
   [1913 Webster]

         The wretch who slights the bounty of the skies.
                                                  --Cowper.
   [1913 Webster]

   To slight off, to treat slightingly; to drive off; to
      remove. [R.] -- To slight over, to run over in haste; to
      perform superficially; to treat carelessly; as, to slight
      over a theme. "They will but slight it over." --Bacon.
      [1913 Webster]

   Syn: To neglect; disregard; disdain; scorn.

   Usage: Slight, Neglect. To slight is stronger than to
          neglect. We may neglect a duty or person from
          inconsiderateness, or from being over-occupied in
          other concerns. To slight is always a positive and
          intentional act, resulting from feelings of dislike or
          contempt. We ought to put a kind construction on what
          appears neglect on the part of a friend; but when he
          slights us, it is obvious that he is our friend no
          longer.
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                Beware . . . lest the like befall . . .
                If they transgress and slight that sole command.
                                                  --Milton.
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                This my long-sufferance, and my day of grace,
                Those who neglect and scorn shall never taste.
                                                  --Milton.
          [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Slighting \Slight"ing\, a.
   Characterized by neglect or disregard.
   [1913 Webster]

WordNet (r) 3.0 (2006):

slighting
    adj 1: tending to diminish or disparage; "belittling comments";
           "managed a deprecating smile at the compliment";
           "deprecatory remarks about the book"; "a slighting
           remark" [syn: belittling, deprecating, deprecative,
           deprecatory, depreciative, depreciatory,
           slighting]