Euthyphro, a dialogue exploring ‘piety’, deals with the definition of ‘piety’ through Socrates’ elenchos, which is revealed in Plato’s early works. However, like Plato’s other early works, the dialogue Euthyphro a ls o does not r eveal t he c orrect d efinition o f ‘ piety’, w hich i s the s ubject o f investigation. Therefore, many scholars try to find clues about ‘what is piety’ in the discussion between Socrates and Euthyphro, and through this, they try to reveal the essence of Socrates’ question, ‘what is it (piety)?’. However, despite t he attempts of thes e s cholars, t his is s ue is s till a t t he c enter o f controversy without consensus. Therefore, in order to find a clue to consistently interpret Socrates' position on 'piety' in Euthyphro, this paper introduces various scholars' interpretations of the definition of 'piety' demanded by Socrates in Euthyphro and presents a new interpretive possibility for the 'piety' of Euthyphro, focusing on the passages 10a1-11b5, which are the most controversial in interpretation. And through these interpretive possibilities, we explore the 'definition method' required by Socrates .