Definition from Wiktionary, the free dictionary
See also Ruin
ruin (plural ruins)
- (countable) construction withered by time.
- (uncountable) The state of being a ruin, destroyed or decayed.
- The monastery has fallen into ruin.
- (uncountable) Something which leads to serious troubles.
- Gambling has been the ruin of many.
construction withered by time
the state of being a ruin, destroyed or decayed
something which leads to serious troubles
- (transitive) to cause the ruin of.
- To destroy or make something no longer be able to be for good use.
- He ruined his new white slacks by accidentally spilling oil on them.
- To upset or mess up the plans or progress of, or to put into disarray; to spoil.
- My car breaking down just as I was on the road ruined my vacation.
to cause the ruin of
- ruin in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913
- ruin in The Century Dictionary, The Century Co., New York, 1911
- ruin at OneLook Dictionary Search
See also 
- a ruin (remains of a building)
- ruin (financial bankruptcy)
Declension of ruin