Entertaiment is anything that catches the eye and mind of an audience. It can be as simple as watching a film to as complex as attending a theatre production. It can be as individual as a private entertainment chosen by an individual to as collective as a party or performance for thousands.
According to Oliver and Barstsch (2010), entertainment is understood objectively, encompasses communication between text and audience, requires an external stimulus, offers pleasure and occurs in a passive form. It hits the points that our brains were evolved to respond deeply to. It stimulates the brain to realease seratonin, dopamine and other chemicals. It also gives us a sense of achievement. It may be serious, or it may be humorous or trivial. It is generally enjoyable, but it can have a darker side such as social backstabbing and murders.