mythical

A mythical creature or thing is one that's not real or true. It might sound silly or imaginary.

When people talk about myths or mythological creatures like unicorns or dragons, they usually mean things from ancient stories or legends. These stories often have magical beings and events that aren't meant to be taken as fact. When a book or movie calls something "mythical," it's saying the idea is too incredible or unbelievable to be true. A mythical city might be a place from a dream world, where fantastical things can happen.