Information that is of public domain is open content. Specifically open content is copyrighted but made available to the public for reuse under license terms.
Content that has been licensed for 'free' distribution.
Open content, coined by analogy with "open source," is used to describe content that can be modified by anyone; there is no closed group responsible for all the editing. It also describes any kind of creative work including articles, pictures, audio, and video that is published in a format that explicitly allows the copying of the information. In summary, we all work together to provide the best athlete news and then we can use this news anywhere we want.
Here this is used as a generic term. Content is any material, data, files, images, texts, which are not part of software or other digital systems but which are handled by them. "Open" content is any such content which is made available by means of one of the kinds of licenses described in this booklet. One of the licenses described here, "Open Content" (see page 86) which has now been subsumed by the Creative Commons project also used this term.
Open content describes creative works including articles, images and audio that have been published in a format that permits reuse or reproduction of the information. Such content can be placed in the public domain or under licenses including the GNU Free Documentation License. The term is sometimes employed to describe content that can be modified by anyone. Also see Wikipedia Definition: Open Content
Copyrighted information that is made available by the copyright owner to the general public under license terms that allow reuse of the material. It often comes with the requirement that the user grant the public the same rights to the modified version that the user received from the copyright owner.
Open content, coined by analogy with "open source", describes any kind of creative work (including articles, pictures, audio, and video) or engineering work (i.e. open machine design) that is published in a format that explicitly allows the copying and the modifying of the information by anyone; not exclusively by a closed organization, firm or individual.