Something that affords pleasure, diversion, or amusement: The ball was an elaborate entertainment.
Entertainment is the most important part of any restaurant. It is what separates good restaurants from great ones.
It is also what separates great actors from average ones. The best actors can take a boring, mundane topic and turn it into an amazing piece of entertainment.
Entertainment is what the human mind evolved to deeply respond to. It hits on themes the brain was shaped to understand in order to function in a social world like backstabbing, murders and other things the brain was wired to perceive. Entertainment includes watching movies and TV, listening to music, reading books, playing sports and games, attending live performances, and seeing visual art.