allegory vs. metaphor

a representation of an abstract or spiritual meaning through concrete or material forms; figurative treatment of one subject under the guise of another.

a symbolical narrative:

emblem ( def 3 ).

a figure of speech in which a term or phrase is applied to something to which it is not literally applicable in order to suggest a resemblance, as in “A mighty fortress is our God.” Compare mixed metaphor, simile ( def 1 ).

something used, or regarded as being used, to represent something else; emblem; symbol.