Ancient is an adjective meaning belonging to the very distant past and no longer in existence.
In colloquial usage, ancient can also mean very old or outdated.
The term "ancient" also refers to:
1. Ancient history - the study of human history from the beginning of writing to the Middle Ages
2. Ancient civilization - early complex societies like Egypt, Mesopotamia, and China
3. Ancient Greek/Roman - relating to classical antiquity
4. Ancient artifacts - objects from antiquity