The word entertaiment is most commonly used as a synonym for amusement, diversion, or entertainment. It may also refer to a particular type of performance, such as a ball or theatrical play. Entertaiment can also refer to an agreeable occupation for the mind: solving a crossword puzzle, for example, is entertainment for many. However, what constitutes entertaiment can vary depending on social and cultural norms: for example, an activity that is considered entertainment by one group or individual might be viewed as work or even cruelty by another. According to Bates and Ferri, entertainment is understood objectively, communicates between text and audience, offers pleasure, requires an audience, and is a form of passive activity.