/,əʊvə'dju:; [US] -'du:; `ovɚ`du/
adj [usu pred 通常作表语] not paid, completed, arrived, etc by the due or expected time （到期或到时）未付款, 未完成, 未到达
*These bills are overdue, ie should have been paid before now. 这些帐单已逾期未付.
* The baby is two weeks overdue, ie still not born two weeks after the expected date of birth. 那胎儿已超过预产期两个星期了.
* The train is overdue, ie late. 火车误点了.

adj
not done, paid, returned etc by the time expected
　an overdue gas bill
　The library books are overdue.
　The baby was a week overdue (=it was expected to be born a week ago) .
something that is overdue should have happened or been done a long time ago
overdue for
　He was overdue for a shave.
　We welcome this announcement and think it's long overdue .