Question

What is the best explanation of what “public domain” means?

Answer 1

“Public domain” means a text or an image is free for anyone to use.

Answer 2

A.  Public domain means whose exclusive intellectual rights have expired , have been forfeited, have been expressly waived, or are incapable.  So if someone owned a building but had their rights for the building terminated, that building is now a public domain until someone buys the building. So, after the building has been handed over because of the terminated rights of the owner, it is now a "Public Domain".