symbolism is so far the most asked tag on the site. Its tag wiki says:
For questions concerning symbolic features in a work of literature. A symbol is used in a book to represent another concept. You should use this tag if the questions concerns a symbol.
However, I have taken it to be a tag that is more related to the meanings and themes of works in general. I thought of this question while debating whether to add symbolism to What does "The Edge of Doom" mean?.
Does the tag include "symbols" that are not physically talked about in the text? Can it include the meanings of passages or works as well as representation of objects, or is this definition too broad?