purpuraPronunciation: /ˈpəːpjʊrə/Definition of purpura noun [mass noun] Medicine a rash of purple spots on the skin caused by internal bleeding from small blood vessels. [with modifier] any of a number of diseases characterized by such a rash:psychogenic purpuraDerivatives purpuricPronunciation: /-ˈpjʊərɪk/ adjective Origin: mid 18th century: from Latin, from Greek porphura 'purple'purpura in other Oxford dictionaries Definition of purpura in the US English dictionary