The word entertainment can refer to a number of activities, from the simple act of enjoying a meal with a friend to a professional performance. It can also mean a serious event, such as a wedding or a religious festival. It can even mean a way of achieving insight or intellectual growth.
A form of entertainment can be a good way of passing the time and helping to break up the monotony of life, whether in private or public settings.
The word can be abbreviated to entmt on fliers and industry news publications. It is not used in general prose outside of these situations.