Entertaiment is an interesting word because it relates to so many different aspects of life and can be applied to so many things. It can be a pleasant diversion like solving a crossword puzzle or it can be something more elaborate like a ball or performance. It can also be the theme of a story like Scheherazade or it can be the basis for an innovative video game. Often, the word is abbreviated to entmt on fliers or in industry news publications when space is limited.
Entertainment can really hit the mark with people because it often touches on issues that the human brain was shaped to deeply react to such as murders and backstabbing in social groups. This gives a feeling of pleasure and adrenaline as the mind is stimulated to realease seratonin and dopamine.