Definition of Faustian adjective from the Oxford Advanced American Dictionary

 

Faustian

 adjective
adjective
NAmE//ˈfaʊstiən//
 
(formal)Faustian bargain/pact/agreement
 
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an agreement in which someone agrees to do something bad or dishonest, in return for money, success, or power From Faust, who, according to the German legend, sold his soul to the Devil in return for many years of power and pleasure.
See the Oxford Advanced Learner's Dictionary entry: Faustian