Allegorical
As a literary device, an allegory in its most general sense is an extended metaphor. Allegory has been used widely throughout the histories of all forms of art, largely because it readily illustrates complex ideas and concepts in ways that are comprehensible to its viewers, readers, or listeners. Allegories are typically used as literary devices or rhetorical devices that convey hidden meanings through symbolic figures, actions, imagery, and/or events, which together create the moral, spiritual, or political meaning the author wishes to convey. (sourse: en.wikipedia.org)