Learner's definition of ANCIENT
[more ancient; most ancient]
1 : very old: having lived or existed for a very long time— often used in an exaggerated way to describe an old machine, person, etc.
We got a ride in an ancient truck.
an ancient barn
I never thought I'd feel ancient at age 31.
She finally decided to replace her ancient computer with something more modern and up to date.
2 : of, coming from, or belonging to a time that was long ago in the past
The practice was more common in ancient times than it is now.
life in ancient Egypt/Rome/Greece/China
the gods of the ancient Romans
She studied both ancient and modern history.
◊ In informal use, something that happened long ago and that is not important any more is ancient history.