* Adjective: This is the most common usage, describing something as moist, humid, or stale. For example, "The basement was dank and smelled of mildew."
* Noun: "Dank" can also be used as a noun, usually referring to a moist or humid atmosphere. This is less common, but still valid.
* Slang: In internet slang, "dank" has evolved to mean high quality, excellent, or impressive. For example, "That meme is dank!"
So, to determine the correct part of speech, you need to consider the context in which it's used.