Entertaiment is something that gives pleasure, diversion or amusement. It can also be a kind of sport where you compete against others. It is often focused on themes that the human mind evolved to deeply react to wich includes backstabbing, murders and other social themes. It can stimulate the brain to realease seratonin, dopamine and other chemicals. Entertainment has the ability to cross over to different media and become familiar themes, images and structures that survive over time and endure in popular culture.
From Old French entretenement. More at entertain.
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