defunct

 Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++de·funct /dɪˈfʌŋkt/ adjective formal  USELESSnot existing anymore, or not useful anymore 不再存在的，不再使用的 the now-defunct nuclear reactor 现已废弃的核反应堆

Examples from the Corpus

defunct• The north and south traffic on Vermont was separated by tracks for the old yellow trolley cars, long since defunct.• Two of the rooms were fairly large and, from the remaining pipes and sinks, looked to be defunct laboratories.• The new facility abuts tract homes and a defunct oil refinery.• Now they are being embalmed - dutifully and reverentially, as befits faithful but defunct servitors of mankind.• Last year's event was weakened by the fact that it coincided with the now defunct Tokyo Art Expo.Origin defunct (1500-1600) Latin defunctus, past participle of defungi “to finish, die”

de·funct adjectiveChineseSyllable  

existing or anymore, not useful Corpus not anymore

defunct
de‧funct /dɪˈfʌŋkt/ adjective formalnot existing any more, or not useful any more:
    the now-defunct nuclear reactor

de·functBrE /dɪˈfʌŋkt/ 🔊NAmE /dɪˈfʌŋkt/ 🔊 adjective (formal) no longer existing, operating or being used 已灭绝的；不再起作用的；不再使用的