"Tuned out" is an idiomatic expression that refers to someone who is not paying attention or actively listening to a conversation. Some synonyms for "tuned out" include being distracted, uninterested, disengaged, absent-minded, inattentive, and remote. When someone is distracted, they are not focused on the conversation at hand and may be thinking about something else altogether. Uninterested people lack curiosity and do not show any enthusiasm or eagerness. Disengaged individuals are emotionally detached and may seem aloof. An absent-minded person may be forgetful or preoccupied with other thoughts. Short attention spans could lead to inattentiveness, while remote individuals may be physically present but mentally absent.