PUBLIC DOMAIN

A term of American copyright law referring to works that are not copyright protected, free for all to use without permission. Examples include works that were originally non-copyrightable (items that by their very nature are not eligible for copyright such as ideas, facts or names), copyright that has been lost or expired, where copyright is owned or authored by the federal government (federal documents and publications are not copyrighted and so are public domain), and those works which have been specifically granted to the public domain.