An erudite person is someone who is highly educated and knowledgeable. A SCHOLAR is a person who has studied a particular subject in great depth, while a SAVANT is someone who has an extraordinary level of knowledge in a specific area. A PEDANT is someone who is overly concerned with details and rules, often to the point of being annoying. All three terms describe someone who is highly knowledgeable and well-versed in a particular field.