Intentionality is a property of an important class of things: things that represent, or are about something. Thus a belief or sentence or story is about something, a painting or photo is of something, a sign is a sign of something, and a desire is a desire for something. These disparate things all display intentionality. They have content; they represent some state of affairs beyond themselves. The represented state of affairs need not be actual, and is not in the cases of false belief, unfulfilled desire, or Salvadore Dali painting.