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1. often ruins
a. The state of being physically destroyed, collapsed, or decayed: The castle fell into ruin.
b. The state of being extensively harmed or damaged: Our vacation plans are in ruins.
c. Poverty of bankruptcy: Their decision brought the bank to ruin.
a. often ruins A destroyed, collapsed, or decayed building or other physical entity: the ruins of the old mill.
b. One that has been extensively damaged or harmed: He is a ruin of his former self.
3. A cause of destruction or irreparable harm or loss: Gambling will be his ruin.
tr.v. ru·ined, ru·in·ing, ru·ins
1. To cause (a building, for example) to be in a destroyed, collapsed, or decayed state.
a. To harm or damage the quality or value of (something) irreparably: A bad diet ruined his health.
b. To harm or damage the enjoyment or experience of (something) greatly: ruined the movie by talking throughout it; ruined the book by giving away the ending.
3. To reduce to poverty or bankruptcy: Bad loans ruined the banker.

[Middle English ruine, from Old French, from Latin ruīna, from ruere, to rush, collapse.]

ru′in·a·ble adj.
ru′in·er n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.ruining - destruction achieved by causing something to be wrecked or ruinedruining - destruction achieved by causing something to be wrecked or ruined
destruction, devastation - the termination of something by causing so much damage to it that it cannot be repaired or no longer exists
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in classic literature ?
You are not only driving me to distraction but also ruining yourself with this eternal solicitude for your reputation.
So to hold it they were compelled to dismantle many cities in the country, for in truth there is no safe way to retain them otherwise than by ruining them.
Tesco, Aldi, Morrisons and Sainsbury's have been accused of "ruining Christmas" by some shoppers following reports of "rotten" and "mouldy" turkeys.