Allegory

Allegory is a form of extended metaphor, in which objects, persons, and actions in a narrative, are equated with the meanings that lie outside the narrative itself. The underlying meaning has moral, social, religious, or political significance, and characters are often personifications of abstract ideas as charity, greed, or envy. 
Thus an allegory is a story with two meanings, a literal meaning and a symbolic meaning. 


allegorical story
たとえ話

use allegory
たとえ話を用いる

narrative
物語、談話

underlying
下部の、下層の
基本的な、根本的な

personification
〔美術や文学における〕象徴