dementiaKK [dɪˋmɛnʃiə] /dɪˈmɛnʃiə/名詞1失智症、癡呆症醫學Her grandmother was diagnosed with dementia three years ago.她的祖母三年前被診斷出失智症。2失智、健忘口語I forgot my own phone number today—early dementia, I guess.我今天連自己的電話號碼都忘了,大概是提早失智了。