An entertainment is any activity which provides a diversion or permits people to amuse themselves in their leisure time.
Entertainment is typically passive - as in watching opera or a movie. Activities which involve participating in games or sports are more often considered to be recreation. Activities such as personal reading or practising a musical instruments are considered as hobbies.
The industry that provides entertainment is called the entertainment industry. There are many forms of entertainment, which cater for particular tastes. For example, there is cinema, theatre, sports, games, social dance which cater for different groups of people. These may also be grouped on the age of persons interested, such as child entertainment or adult entertainment. For example, puppets, clowns, pantomimes and cartoons tend to appeal to children, though adults may also find them enjoyable.