In the 20th century, such an approach was gradually superseded by the academic method, and the term "Man of Letters" became disused, replaced by the generic term "intellectual", describing the intellectual person.
1. a. Of or relating to the intellect. b. Rational rather than emotional: an intellectual decision. 2. Appealing to or engaging the intellect: an intellectual book; an intellectual problem. 3. a. Having or showing intellect, especially to a high degree. See Synonyms at intelligent.