ancient

People who lived in a period of history long ago.

"The wisdom of the ancients is profound."

Relating to the distant past, especially before the Middle Ages.

"She specialises in ancient Greek philosophy."

(Informal) Extremely old-fashioned, outdated, or no longer relevant.

"My dad's computer is ancient now."

Having existed for an extremely long time; very old.

"They discovered ancient ruins in the valley."