The spirit of a dead person that has taken possession of a living person. Folk literature of the dybbuk has been known in the Jewish world since the 13th century and continued to exist in mystic and Hasidic circles into the 20th century. S. An-Ski (1863–1920) adapted the material in his 1914 play Tsvishn tsvey veltn (Between Two Worlds or The Dybbuk), which constituted a milestone in Yiddish and Hebrew theatre of the 20th century. With the transfer of mys…