in ruins prepositional phrase2 •Of a building or structure, mostly destroyed.The line ends at Narvik. Eight years ago the whole town was in ruins, but the industry of the Norwegian people has rebuilt it entirely. — 1953 •(figurative) Of a person, attribute, relationship, etc., totally damaged or spoiled.After being found guilty of animal abuse, her reputation was in ruins.His finances were in ruins after spending all his inheritance on cars and drugs.