An information or document that has been leaked has become known to people who weren't supposed to see it.
Imagine your friend accidentally sends a confidential email to the whole school instead of just the teacher. That's an example of something leaking out - information meant for someone else gets shared with more people than intended. Leaked can also mean something being let loose or flowing freely, like water from a burst pipe.
To allow fluid or gas to pass through an opening that should be sealed.
Example: The faucet has been leaking since last month.
Of a document, etc, produced by a company or organization, intended to be confidential but having been released to the public or the press.

It was rough, rough and it was leaked maybe a week before we came out. And I think, I just remember someone saying, I think it's up to 10 million people have seen it already before we'd come out.
9:19I can give you an example of bad leak. X-Men Origins Wolverine, when I think a week before the whole movie was somehow leaked online.
9:05