Source : Webster's Revised Unabridged Dictionary (1913)

Ruination \Ru`in*a"tion\, n. [LL. ruinatio.]
   The act of ruining, or the state of being ruined.

Source : WordNet®

ruination
     n 1: an irrecoverable state of devastation and destruction; "you
          have brought ruin on this entire family" [syn: {ruin}]
     2: an event that results in destruction [syn: {ruin}]
     3: failure that results in a loss of position or reputation
        [syn: {downfall}, {ruin}]
     4: destruction achieved by wrecking something [syn: {laying
        waste}, {ruin}, {ruining}, {wrecking}]