a daydream is a visionary fantasy experienced while awake, especially one of happy, pleasant thoughts, hopes or ambitions. there are so many different types of daydreaming that there is still no consensus definition amongst psychologists. while daydreams may include fantasies about future scenarios or plans, reminiscences about past experiences, or vivid dream-like images, they are often connected with some type of emotion. while daydreaming has long been derided as a lazy, non-productive pastime, daydreaming can be constructive in some contexts. there are numerous examples of people in creative or artistic careers, such as composers, novelists and filmmakers, developing new ideas through daydreaming.