Answer: The meaning of the word "countenance" as it is used in the passage provided is d. "noun: facial expression".
Explanation: In this passage from "The Raven",<u> the word "countenance" has been used as a noun as it is identifying a thing rather than denoting an action. </u>Moreover, it has been premodified by the determiner "the". As regards its meaning, <u>"countenance" refers to the appearance or the expression in the face of a person/animal.</u> Therefore, the option that provides the correct meaning is D. noun: facial expression.