(countable, sometimes in the plural) The remains of a destroyed or dilapidated construction, such as a house or castle.

(uncountable) The state of being a ruin, destroyed or decayed.

(uncountable) Something that leads to serious trouble or destruction.

The act of ruining something.

A change that destroys or defeats something; destruction; overthrow.

(uncountable) Complete financial loss; bankruptcy.

(transitive) To cause the fiscal ruin of; to bankrupt or drive out of business.

To destroy or make something no longer usable.

To upset or overturn the plans or progress of, or to have a disastrous effect on something.

To make something less enjoyable or likeable.

To reveal the ending of (a story); to spoil.

(transitive, historical) To seduce or debauch, and thus harm the social standing of.