“This one is ancient!”

You want to buy a new phone. You're trying to explain to your husband why you want a new one. You say:

This one is ancient!

(something) is ancient

The word "ancient" describes things that are thousands of years old. Some examples of "ancient" things include the Egyptian pyramids, the redwood trees in California that are over a thousand years old, and old religious stories from thousands of years ago.

Because the word "ancient" has such an extreme meaning, people often use it to exaggerate about how old something is. In the example above, the phone is only a few years, but it seems very old because new phones are coming out so quickly.

These days, people actually use "ancient" quite often to talk about technology that's old and out-of-date:

I've got to get a new laptop. Mine is absolutely ancient.