Being unpaid when due.
An overdue bill.
Coming or arriving after the scheduled or expected time.
An overdue train.
Past the time for payment.
Delayed in arrival or occurrence beyond the time set or anticipated.
Expected or required but not yet having come about.
An overdue apology.
That should have come about sooner.
The definition of overdue is happening late, or past the payment deadline.
An example of something overdue is the arrival of a train that is running late.
An example of something overdue is a credit card bill that was due a month ago.