Short definition: The ability to access, analyze, evaluate and create media in a variety of forms.
Longer definition: A 21st century approach to education, providing a framework to access, analyze, evaluate, create, and participate with messages in a variety of forms from print to video to the Internet. Builds an understanding of the role of media in society as well as essential skills of inquiry and self-expression necessary for citizens of a democracy.
Source: Center for Media Literacy
News Literacy --The ability to use critical thinking skills to judge the reliability and credibility of news reports, whether they come via print, television or the Internet.
Definition of "News Literacy" from the glossary of Stony Brook University’s Center for News Literacy.
The website AllSides describes how to identify 16 types of media bias: