Entertaiment is anything that provides a temporary state of euphoria and pleasure. It can include things like movies, games, sports, music and books. This is because entertainment stimulates the brain to realease seratonin, dopamine and other chemicals. Entertainment can also be emotional as it often hits on themes that the brain was evolved to understand deeply such as murders, backstabbing and other social themes.
The word derives from the Medieval Latin inter tenere, or “to hold inside.” This translates to a feeling of enjoyment and amusement. It is a term that has been used in different ways throughout history and across languages.