Please remove the defunct email addresses from our customer mailing list before Friday.

請在星期五之前，將已失效的電子郵件地址從我們的客戶郵寄名單中移除。

The shipment was returned because the supplier's warehouse address is now defunct.

這批貨被退回，因為供應商的倉庫地址現在已經不再使用了。

Several job applicants listed references from companies that have since become defunct.

有幾位求職者列出的推薦人，任職的公司後來都已經倒閉了。