Longman Dictionary English From Longman Dictionary of Contemporary EnglishMephistophelesMeph‧i‧stoph‧e‧les /ˌmefəˈstɒfəliːz $ -ˈstɑː-/ another name for the devil, especially in the story of Faust —Mephistophelean /ˌmefɪstəˈfiːliən◂/ adjective ldoceonline.com