Then, methought, the air grew denser, perfumed from an unseen censer
Swung by Seraphim whose foot-falls tinkled on the tufted floor.
According to the Bible, seraphim (translated as ‘burning ones’) are six-winged heavenly beings who circle the throne of God. Censers are typically seen in churches during services and times of prayer, they are vessels which emit incense, which can make air seem dense by making it feel hotter and more humid.
To help improve the meaning of these lyrics, visit “The Raven” by Edgar Allan Poe and leave a comment on the lyrics box