kwashiorkorPronunciation: /ˌkwɒʃɪˈɔːkɔː, ˌkwa-/Definition of kwashiorkor noun [mass noun] a form of malnutrition caused by protein deficiency in the diet, typically affecting young children in the tropics. Origin: 1930s: a local word in Ghanakwashiorkor in other Oxford dictionaries Definition of kwashiorkor in the US English dictionary