Source : Webster's Revised Unabridged Dictionary (1913)

Destructive \De*struc"tive\, n.
   One who destroys; a radical reformer; a destructionist.

Destructive \De*struc"tive\, a. [L. destructivus: cf. F.
   destructif.]
   Causing destruction; tending to bring about ruin, death, or
   devastation; ruinous; fatal; productive of serious evil;
   mischievous; pernicious; -- often with of or to; as,
   intemperance is destructive of health; evil examples are
   destructive to the morals of youth.

         Time's destructive power.                --Wordsworth.

   {Destructive distillation}. See {Distillation}.

   {Destructive sorties}(Logic), a process of reasoning which
      involves the denial of the first of a series of dependent
      propositions as a consequence of the denial of the last; a
      species of reductio ad absurdum. --Whately.

   Syn: Mortal; deadly; poisonous; fatal; ruinous; malignant;
        baleful; pernicious; mischievous.

Source : WordNet®

destructive
     adj : causing destruction or much damage; "a policy that is
           destructive to the economy"; "destructive criticism"
           [ant: {constructive}]