adj.失效的，不再存在的，不再起作用的，不再使用的
n.死者，死人

原形：defunct复数：defuncts

The company declared bankruptcy last year and is now defunct.
该公司去年宣布破产，现在已经倒闭了。
The old bridge has been deemed defunct and a new one is under construction.
那座旧桥已被认定为无法使用，新桥正在建设中。
The law from the 1950s is defunct and no longer applicable in today's society.
20世纪50年代的那条法律已经失效，不再适用于当今社会。
The defunct website hasn't been updated since 2005.
这个已废弃的网站自2005年以来就没有更新过。
The project was defunct due to lack of funding.
由于缺乏资金，该项目已经终止。
Many defunct factories in the area are being converted into trendy loft apartments.
当地许多废弃的工厂正被改造为时尚的阁楼公寓。
The organization ceased operations in 2010 and is now considered defunct.
该组织于2010年停止运作，现在被认为已经解散。
The once popular social media platform is now defunct, replaced by newer, more dynamic alternatives.
曾经很受欢迎的社交媒体平台现在已经失效，被更新、更活跃的替代品所取代。
The research institute, after years of financial struggles, finally announced its defunct status.
经过多年的财政挣扎，这家研究机构最终宣布了其解散的状态。
The defunct amusement park still stands as a haunting reminder of happier times.
那个废弃的游乐园仍然矗立着，作为昔日欢乐时光的凄凉回忆。