Littréan /lɪtˈɹeɪən/ adjective1 •Of or relating to Émile Littré (1801–1881), French philosopher and lexicographer best known for his Dictionnaire de la langue française.Perhaps we shall find, or our successors will find, that there has been side by side with much hindrance traceable to the Littréan school a considerable amount of preparatory work done by it. — 1892