a serious mental disorder caused by brain disease or injury, that affects the ability to think, remember and behave normally 癡呆 patients with dementia 癡呆症患者 a dementia sufferer/patient 癡呆症患者/病人 She was diagnosed with dementia. 她被診斷患有癡呆症。 111 people in the study subsequently developed dementia. 研究中的111人随後患上了癡呆症。 The staff have specialist training in dementia care. 工作人員接受了癡呆症護理方面的專業培訓。
Word Originlate 18th cent.: from Latin, from demens, dement- ‘out of one's mind’.