POST ENTRY, maritime law. When a merchant makes an entry on the importation of, goods, and at the time he is not able to calculate exactly the duties which he is liable to pay, gave rise to the practice of allowing entries to be made after the goods have been weighed, measured or gauged, to make up the deficiency of the original or prime entry; the entry thus allowed to be made is called a post entry. Chit. Com. Law, 746.