The tag meaning has the following wiki excerpt (it has no wiki currently):
What does a specific part of a song mean? What does the interpreter or songwriter try to tell us?
This makes the tag song-interpretation redundant.
In fact, there are only 611 questions tagged song-interpretation, all of which are naturally within the scope of the tag meaning, which has 116133 questions.
So, I suggest that we either retag the questions tagged song-interpretation so that we can eliminate it, or synonymise and merge the tags keeping meaning as the master.