apraxiaPronunciation: /əˈpraksɪə/Definition of apraxia noun [mass noun] Medicine inability to perform particular purposive actions, as a result of brain damage: [with modifier]:dressing apraxiaDerivatives apraxic adjective Origin: late 19th century: from German Apraxie, from Greek apraxia 'inaction'apraxia in other Oxford dictionaries Definition of apraxia in the US English dictionary