A “daydreamer” is a noun that refers to a person who indulges in daydreaming, which is the experience of dreaming while awake. This often involves the person being lost in thought or imagination, drifting away from their immediate surroundings, and engaging in fantasies or scenarios that are not currently happening. Daydreamers may often be seen as distracted or preoccupied with their thoughts rather than focused on their current tasks or environment.