'Ruiner' definitions:

Definition of 'ruiner'

From: WordNet
noun
A person who destroys or ruins or lays waste to; "a destroyer of the environment"; "jealousy was his undoer"; "uprooters of gravestones" [syn: destroyer, ruiner, undoer, waster, uprooter]

Definition of 'Ruiner'

From: GCIDE
  • Ruiner \Ru"in*er\, n. One who, or that which, ruins. [1913 Webster]