 Somer's definition of the condition is “extensive fantasy activity that replaces human interaction and/or interferes with academic, interpersonal, or vocational functioning.”

Many human experiences range between the normal to the abnormal.Daydreaming, a form of normal dissociation associated with absorption, is a highly prevalent mental activity experienced by almost everyone.It is thought to encompass almost half of all human thought, with hundreds of daydreaming sequences experienced daily.