Source : Webster's Revised Unabridged Dictionary (1913)

Ruin \Ru"in\, v. t. [imp. & p. p. {Ruined};p. pr. & vb. n.
   {Ruining}.] [Cf. F. ruiner, LL. ruinare. See {Ruin}, n.]
   To bring to ruin; to cause to fall to pieces and decay; to
   make to perish; to bring to destruction; to bring to poverty
   or bankruptcy; to impair seriously; to damage essentially; to
   overthrow.

         this mortal house I'll ruin.             --Shak.

         By thee raised, I ruin all my foes.      --Milton.

         The eyes of other people are the eyes that ruin us.
                                                  --Franklin.

         By the fireside there are old men seated, Seeling
         ruined cities in the ashes.              --Longfellow.

Source : WordNet®

ruined
     adj 1: destroyed physically or morally [syn: {destroyed}]
     2: doomed to extinction [syn: {done for(p)}, {sunk}, {undone},
        {washed-up}]
     3: brought to ruin; "after the revolution the aristocracy was
        finished"; "the unsuccessful run for office left him
        ruined politically and economically" [syn: {finished}]
     4: made uninhabitable; "upon this blasted heath"- Shakespeare;
        "a wasted landscape" [syn: {blasted}, {desolate}, {desolated},
         {devastated}, {ravaged}, {wasted}]