Source : Webster's Revised Unabridged Dictionary (1913)

Subversion \Sub*ver"sion\, n. [L. subversio: cf. F. subversion.
   See {Subvert}.]
   The act of overturning, or the state of being overturned;
   entire overthrow; an overthrow from the foundation; utter
   ruin; destruction; as, the subversion of a government; the
   subversion of despotic power; the subversion of the
   constitution.

         The subversion [by a storm] of woods and timber . . .
         through my whole estate.                 --Evelyn.

         Laws have been often abused to the oppression and
         subversion of that order they were intended to
         preserve.                                --Rogers.

Source : WordNet®

subversion
     n 1: destroying someone's (or some group's) honesty or loyalty;
          undermining moral integrity; "corruption of a minor";
          "the big city's subversion of rural innocence" [syn: {corruption}]
     2: the act of subverting; as overthrowing or destroying a
        legally constituted government [syn: {subversive activity}]