痴呆症 chīdāizhèng dementia Definitions Defs Origin Strokes Stroke Words Sentences Sents chīdāizhèng dementia 痴呆 chīdāi noun dementia (medicine) a medical condition involving the loss of memory and mental capacity症 zhèng affixnoun disease (bound form) disease; illness; medical symptomschīdāizhèng cretinism 痴呆 chīdāi dull-witted stupid; silly; dull-witted in manner or appearance症 zhèng affixnoun disease (bound form) disease; illness; medical symptoms