"Boundary/limit before which"; standard Latin
phrase used in archaeology
, and textual dating to denote the latest possible date of an object or text's creation. Thus, the Gallus papyri
found at Qasr Ibrim
have a terminus ante quem
of about 60 A.D., based on the latest known date of the fort's Roman
occupation, and a terminus post quem
of 23 B.C.
Generally used whenever a date cannot be set within a reasonably specific time-frame.