The Oxford Thesaurus An A-Z Dictionary of Synonyms - breakdown n.

1) collapse, downfall, failure, foundering; destruction, ruin: There was a breakdown of our computer system. The arbitrators blamed a breakdown of communication between union and management. 2) (mental) collapse, nervous breakdown, Colloq crack-up: She had a bad breakdown after her daughter was killed. 3) analysis, run-down, detailing, review; decomposition, itemization, classification, dissection, distillation, fractionation: I want a breakdown of these figures by noon. The chemical breakdown of the substance indicated the presence of arsenic.