Open science - often used interchangeably with the more encompassing term open research - is concerned with making scientific research more transparent and more efficient. A central aspect to it is to provide open access to scientific information, especially to the research published in scholarly journals and to the underlying data, much of which traditional science tends to hide away. Other aspects are more open forms of collaboration and engagement with a wider audience, including citizen scientists and the public at large.
Wikimedia projects can serve as prototypes for open approaches more generally, including in research contexts (example)
User:Daniel Mietchen/Talks/IWR Annual Colloquium 2013/Open research - an introduction