Entertaiment is the ability of a human being to feel good and to have fun. It can be anything from watching a movie to playing a game. It usually hits the themes that human beings was evolved to react deeply to in order to function in the social world. The feeling of entertainment can be created by stimulants like seratonin and dopamine. It can also be triggered by observing the other people around you.
The word comes from the Medieval Latin intertenere, or “to hold inside.” Its Indo-European root is ten, which means to stretch.
Entertainment can be adapted for any size of audience. From a single person who chooses a private entertainment, to a banquet that is adapted for two; or performances intended for thousands of spectators.