A misapprehension prevails in regarding the dead-letter-office as a depository for the safe keeping of undelivered letters, and not as the agent for their final disposal, to correct which the regulations are appended.
Hugh Ley, in describing the post mortem examination of a woman who had died at the full term undelivered (Med.
All letters remaining undelivered in a post office on the first of each month, excepting drop letters and such letters as are daily called for, are advertized in a list posted at the office door for the information of the public.
Letters and papers after remaining undelivered in an office for three months are sent to the Dead Letter Office, as also are all letters refused by the persons to whom they are addressed or letters addressed to persons deceased.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "undelivered" in a variety of sentences. We hope that you will now be able to make sentences using this word.