The Raven: Symbolizes death, and the reminder of death
December: Represents the cold harsh winter, where nothing lives
Night's Plutonian Shore: Pluto is the god of the underworld, this is another symbol for death
Lenore: The tragic, haunting loss of a woman
Basically all of these symbols and many more in The raven stand for death and add a haunting and depressing effect to the story. So they are used for emphasis
Answer It means that you want to find the ultimate answer, what I mean is that you want to be te most specific you can and to that you always ask more questions about it until you find the best answer to your question.