|Origin:||ruine, from Latin ruina|
a situation in which you have lost all your money, your social position, or the good opinion that people had about you:
small businesses facing financial ruin
be on the road to ruin (=be doing something that will make you lose your money, position etc)
2 [countable] also ruins
the part of a building that is left after the rest has been destroyed:
an interesting old ruin
the ruins of a bombed-out office block
the parts of something such as an organization, system, or set of ideas that remain after the rest have been destroyed:
the ruins of a government that once held so much promise
if a building is in ruins, it has fallen down or been badly damaged
if someone's life, a country's economy etc is in ruins, it is affected by very great problems:
Her marriage was in ruins.
5 also go to ruin
if something goes to ruin, it gets damaged or destroyed because no one is taking care of it:
He had let the farm go to ruin.
to make someone lose all their money, their good health, the good opinion that other people have of them etc:
Drinking was the ruin of him.