A agreeable occupation for the mind or a diversion; an amusement: The daily crossword is an entertainment for many people.
Entertainment is a broad term which can refer to any activity that provides pleasure or amusement. It can range from private entertainment, such as reading a good book or watching TV, to a large-scale performance for thousands. In the latter case, it can even be broadcast for a worldwide audience.
Entertaiment is a word that has evolved over time, with different cultures and periods using it in different ways. For example, the story of Scheherazade was told in professional storytelling traditions, turned into music by composers such as Rimsky-Korsakov and Ravel, made into a film by Pasolini and even developed into an innovative video game.