n. The act of falling or tumbling down; violent fall.n. A violent or profound change of a thing, such as to unfit it for use, destroy its value, or bring it to an end; overthrow; downfall; collapse; wreck, material or moral: as, the ruin of a government; the ruin of health; financial ruin.n. That which promotes injury, decay, or destruction; bane.n. That which has undergone overthrow, downfall, or collapse; anything, as a building, in a state of destruction, wreck, or decay; hence, in the plural, the fragments or remains of anything overthrown or destroyed: as, the ruins of former beauty; the ruins of Nineveh.n. The state of being ruined, decayed, destroyed, or rendered worthless.n. Synonyms Subversion, wreck, shipwreck, prostration.To bring to ruin; cause the downfall, overthrow, or collapse of; damage essentially and irreparably; wreck the material or moral well-being of; demolish; subvert; spoil; undo: as, to ruin a city or a government; to ruin commerce; to ruin one's health or reputation.Specifically, to bring to financial ruin; reduce to a state of bankruptcy or extreme poverty.Synonyms To destroy, overthrow, overturn, overwhelm.To impoverish.To fall headlong and with violence; rush furiously downward.To fall into ruins; run to ruin; fall into decay; be dilapidated.To be overwhelmed by loss, failure, suffering, or the like; be brought to misery or poverty.To inflict ruin; do irreparable harm.