Source : Webster's Revised Unabridged Dictionary (1913)

Malign \Ma*lign"\, v. t. [imp. & p. p. {Maligned}; p. pr. & vb.
   n. {Maligning}.] [Cf. L. malignare. See {Malign}, a.]
   To treat with malice; to show hatred toward; to abuse; to
   wrong; to injure. [Obs.]

         The people practice what mischiefs and villainies they
         will against private men, whom they malign by stealing
         their goods, or murdering them.          --Spenser.

   2. To speak great evil of; to traduce; to defame; to slander;
      to vilify; to asperse.

            To be envied and shot at; to be maligned standing,
            and to be despised falling.           --South.

Malign \Ma*lign"\, a. [L. malignus, for maligenus, i. e., of a
   bad kind or nature; malus bad + the root of genus birth,
   race, kind: cf. F. malin, masc., maligne, fem. See {Malice},
   {Gender}, and cf. {Benign}, {Malignant}.]
   1. Having an evil disposition toward others; harboring
      violent enmity; malevolent; malicious; spiteful; --
      opposed to {benign}.

            Witchcraft may be by operation of malign spirits.
                                                  --Bacon.

   2. Unfavorable; unpropitious; pernicious; tending to injure;
      as, a malign aspect of planets.

   3. Malignant; as, a malign ulcer. [R.] --Bacon.

Malign \Ma*lign"\, v. i.
   To entertain malice. [Obs.]

Source : WordNet®

malign
     adj 1: evil or harmful in nature or influence; "prompted by malign
            motives"; "believed in witches and malign spirits";
            "gave him a malign look"; "a malign lesion" [ant: {benign}]
     2: having or exerting a malignant influence; "malevolent
        stars"; "a malefic force" [syn: {malefic}, {malevolent}, {evil}]

malign
     v : speak unfavorably about; "She badmouthes her husband
         everywhere" [syn: {badmouth}, {traduce}, {drag through
         the mud}]