
Fun is defined by the Oxford English Dictionary as "light-hearted pleasure, enjoyment, or amusement; boisterous joviality or merrymaking; entertainment". The word fun is associated with sports, entertaining media, high merriment, and amusement.
The pleasure of fun can be seen by the numerous efforts to harness its positive associations. For example, there are many books on serious subjects, about skills such as music, mathematics and languages, normally quite difficult to master, which have "fun" added to the title.