Entertaiment has become a word that is closely associated with amusement and lightheartedness. Yet it can also have a serious purpose, as in the case of a ceremony, celebration, or religious festival, or a work of satire. It may also be seen as a means of achieving insight or intellectual growth. Its familiar forms can be adapted for any scale, from a private selection of pre-recorded entertainment available on an enormous array of devices to banquets for two; from activities used in hunting or war to spectator sports; and from performances intended for thousands to global broadcast. The following articles illustrate some of these uses.