Having lasted from a remote period; having been of long duration; of great age, very old.
an ancient city an ancient forest
Existent or occurring in time long past, usually in remote ages; belonging to or associated with antiquity; old, as opposed to modern.
an ancient author an ancient empire
(history) Relating to antiquity as a primarily European historical period; the time before the Middle Ages.
Experienced; versed.
Former; sometime.