Answer :

a contextual symbol can be a setting, character, action, object, name, or anything else in a work that maintains its literal significance while suggesting other meanings. SORRY I GOT THIS OFF OF THE INTERNET BUT THIS QUESTION HAS BEEN UP FOR A WHILE AND I WANTED YOU TO GET AN ANSWER!!!! My capslock was stuck sorry. I hope this helps!

A symbol is something (or someone) that represents an idea, concept or object, or that suggest another meaning that is entirely different from its actual form.  

A contextual symbol, then, is a symbol whose meaning is not widely recognized by a society or culture, instead, its one that can only be recognized within the context or framework of a specific story because these are unique symbols that authors created to serve a certain purpose in the story.