Etymology: (1325–75; ME ruine < MF < L ruīna headlong rush, collapse, ruin =ru(ere) to fall +-īna -ine3)
Definition of 'ruin'
Princeton's WordNet
1. (noun)ruin, ruination an irrecoverable state of devastation and destruction "you have brought ruin on this entire family"
2. (noun)ruin a ruined building "they explored several Roman ruins"
3. (noun)dilapidation, ruin the process of becoming dilapidated
4. (noun)ruin, ruination an event that results in destruction
5. (noun)downfall, ruin, ruination failure that results in a loss of position or reputation
6. (verb)laying waste, ruin, ruining, ruination, wrecking destruction achieved by causing something to be wrecked or ruined
7. (verb)destroy, ruin destroy completely; damage irreparably "You have ruined my car by pouring sugar in the tank!"; "The tears ruined her make-up"
8. (verb)ruin destroy or cause to fail "This behavior will ruin your chances of winning the election"
9. (verb)bankrupt, ruin, break, smash reduce to bankruptcy "My daughter's fancy wedding is going to break me!"; "The slump in the financial markets smashed him"
10. (verb)ruin reduce to ruins "The country lay ruined after the war"
11. (verb)deflower, ruin deprive of virginity "This dirty old man deflowered several young girls in the village"
1. (verb)ruin to spoil or damage I ruined my white skirt when I spilt wine on it.; Smoking can ruin your health.
2. ruin to cause sb to lose all their money High bills that almost ruined our business.
3. (noun)ruin the remains of a building that has fallen down or been destroyed the ruins of an old castle
4. ruin when sb loses all their money a family facing financial ruin
5. ruin in ruins in a very bad condition or destroyed She felt her life was in ruins.
Definition of 'ruin'
Webster Dictionary
1. (noun)ruin the act of falling or tumbling down; fall
2. (noun)ruin such a change of anything as destroys it, or entirely defeats its object, or unfits it for use; destruction; overthrow; as, the ruin of a ship or an army; the ruin of a constitution or a government; the ruin of health or hopes
3. (noun)ruin that which is fallen down and become worthless from injury or decay; as, his mind is a ruin; especially, in the plural, the remains of a destroyed, dilapidated, or desolate house, fortress, city, or the like
4. (noun)ruin the state of being dcayed, or of having become ruined or worthless; as, to be in ruins; to go to ruin
5. (noun)ruin that which promotes injury, decay, or destruction
6. (noun)ruin to bring to ruin; to cause to fall to pieces and decay; to make to perish; to bring to destruction; to bring to poverty or bankruptcy; to impair seriously; to damage essentially; to overthrow
7. (verb)ruin to fall to ruins; to go to ruin; to become decayed or dilapidated; to perish
Definitions of ruin 
Afrikaans: verval
Arabic: خَراب، دَمار
Bulgarian: разруха
Brazilian: ruína
Czech: zkáza, zánik, troska
German: die Ruine
Danish: forfald
Greek: ερείπιο, συντρίμμι
Spanish: ruina
Estonian: varemed
Farsi: فروریزی دیوار؛ خرابه
Finnish: raunio
French: ruine
Hebrew: הֶרֶס
Hindi: विनाश, विध्वंस, तबाही, बर
Croatian: ruševina
Hungarian: romlás, pusztulás
Indonesian: keadaan rusak
Icelandic: rúst
Italian: rovina, rudere
Japanese: 廃虚
Korean: 파괴
Lithuanian: žlugimas
Latvian: drupas; gruveši
Malay: musnah
Dutch: ruïne
Norwegian: ødeleggelse, ruin
Polish: ruina
Persian: فروریزی دیوار؛ خرابه
Pashto: خرابه، ویجاړ ځایونه
Portuguese: ruína
Romanian: ruină
Russian: развалины, руины
Slovak: pád, zánik
Slovenian: razvalina
Serbian: ruina
Swedish: ruin[er], spillror
Thai: ซากปรักหักพัง
Turkish: harabe
Taiwanese: 摧毀，廢墟
Ukrainian: руїни
Urdu: خرابی
Vietnamese: sự đổ nát
Chinese: 毁坏，废墟
