Edgar Allen Poe's poem, "The Raven," uses figurative language in lines like, "Once upon a midnight dreary," "To the fowl whose fiery eyes now burned into my bosom's core" and "Suddenly there came a tapping, as of someone gently rapping." Figurative language manifests itself in this poem through simile, imagery, metaphors and personification.
Figurative language is a way of describing something using various figures of speech, usually by comparing it with something else. By giving human characteristics to elements like midnight, tapping and a fowl, Poe describes these things using words usually used to describe a person. This lends the poem an added level of eeriness and foreboding. It also adds a sense of mystery, since things are not described literally, or as they naturally are.