Final answer:
An allegory is a literary device that uses symbols to convey hidden meanings, typically moral or political ones.
Step-by-step explanation:
Allegory is a literary device that uses symbols to convey a hidden or ulterior meaning, usually a moral or political one. It is a figurative treatment of one subject under the guise of another. An example of allegory is Plato's "Allegory of the Cave," where light represents knowledge and darkness represents ignorance.