purpura Syllabification: (pur·pu·ra)Pronunciation: /ˈpərp(y)ərə/Definition of purpura noun Medicine a rash of purple spots on the skin caused by internal bleeding from small blood vessels. [with adjective] any of several diseases characterized by a purple rash:psychogenic purpuraDerivatives purpuricPronunciation: /pərˈpyo͝orik/ adjective Origin: mid 18th century: from Latin, from Greek porphura 'purple'purpura in other Oxford dictionaries Definition of purpura in the British & World English dictionary