Entertaiment is a very broad word that can be used on any scale from one person choosing to listen to a CD or watch a movie to a public concert or performance intended for thousands. It is often abbreviated to entmt. on fliers or in industry news publications where space is limited. The term is often linked to amusement and humour but it can have a more serious purpose like the story of Scheherazade in professional storytelling. This story has inspired many works including an orchestral piece by Rimsky-Korsakov, a film by Pasolini and innovative video games.
The human brain was evolved to respond deeply to many of the themes in entertainment that stimulate the production of seratonin and dopamine and that provide a sense of pleasure and adventure.