Entertaiment is a form of media that appeals to our innate sense of fun, satire and curiosity. It can be anything from social backstabbing to murders and other themes that our brains were evolved to deeply react to, since they are the ways we learn to understand our world around us. The same familiar forms of entertainment have been able to cross over different media, showing a strong continuity that has ensured the popularity of many of these images and structures.
Definition
From Merriam-Webster: “an activity understood objectively, involving communication between text and audience from an external stimulus, offering pleasure to the audience and occurs in a passive form.” Bates and Ferri (2010).