Lewis Short
rŭīna (noun F) : ruo
* A rushing or tumbling down; a falling down, fall (syn.: casus, lapsus).
* In abstracto.
* Lit.
* In concreto.
* Trop., a downfall, fall, ruin; accident, catastrophe, disaster, overthrow, destruction, etc. (freq. and class.; used equally in sing. and plur.; cf.: exitium, pernicies).
* Sing.: vis illa fuit et, ut saepe jam dixi, ruina quaedam atque tempestas,a catastrophe,Cic. Clu. 35, 96: incendium meum ruinā restinguam, with the overthrow, fall (of the State), Catilina ap. Sall. C. 31, 9, and ap. Cic. Mur. 25, 51: ut communi ruinā patriae opprimerentur,Liv. 45, 26; Vell. 2, 91, 4; 2, 85, 1; 2, 124, 1: in hac ruinā rerum stetit una integra atque immobilis virtus populi Romani,Liv. 26, 41: rerum nostrarum,id. 5, 51: urbis,id. 25, 4: ex loco superiore impetu facto, strage ac ruinā fudere Gallos,utter defeat,id. 5, 43; cf.: ruinae similem stragem eques dedit,id. 4, 33: Cannensis,id. 23, 25; 42, 66 fin.; 4, 46; 5, 47: ruina soceri in exsilium pulsus,Tac. H. 4, 6; cf. id. G. 36: pereat sceleratus, regnique trahat patriaeque ruinam,Ov. M. 8, 497: aliae gentes belli sequuntur ruinam,Flor. 2, 12, 1: ille dies utramque Ducet ruinam,i. e. death,Hor. C. 2, 17, 9: Neronis principis,Plin. 17, 25, 38, § 245.
* Plur.: praetermitto ruinas fortunarum tuarum, quas omnes impendere tibi proximis Idibus senties,Cic. Cat. 1, 6, 14: in ruinis aversae, atque afflictae rei publicae,id. Sest. 2, 5: devota morti pectora liberae Quantis fatigaret ruinis,Hor. C. 4, 14, 19; cf.: nox auget ruinas,Val. Fl. 3, 207: principiis in rerum fecere ruinas et graviter magni magno cecidere ibi casu,i. e. false steps, errors, mistakes,Lucr. 1, 740: (Academia) si invaserit in haec, miseras edet ruinas,Cic. Leg. 1, 13, 39: ruinas videres,id. Fin. 5, 28, 83.
* That which tumbles or falls down, a fall (not anteAug.).
* In gen. (poet.): disjectam Aenaeae toto videt aequore classem Fluctibus oppressos Troas caelique ruinā,i. e. a storm, rain,Verg. A. 1, 129; so, caeli (with insani imbres),Sil. 1, 251: poli,i. e. thunder,Val. Fl. 8, 334.
* In partic. (acc. to I. A. 2.), a building that has tumbled down, a ruin, ruins (mostly in plur., and not in Cic. prose): nunc humilis veteres tantummodo Troja ruinas ostendit,Ov. M. 15, 424: Sagunti ruinae nostris capitibus incident,Liv. 21, 10, 10: (urbs) deserta ac strata prope omnis ruinis,id. 33, 38, 10: fumantes Thebarum ruinae,id. 9, 18, 7: ruinis templorum templa aedificare,id. 42, 3: in tugurio ruinarum Carthaginiensium,Vell. 2, 19 fin. —In sing.: alius par labor ... flumina ad lavandam hanc ruinam jugis montium ducere,Plin. 33, 4, 21, § 74: EX RVINA TEMPLI MARTIS,Inscr. Orell. 2448 (A.D. 256).
* Transf., of persons who cause ruin, a destroyer: rei publicae,Cic. Sest. 51, 109: ruinae publicanorum,id. Prov. Cons. 6, 13.
Charlton T. Lewis, Charles Short, A Latin Dictionary