What part of speech is shown on dictionary entry for this word superficial?

A dictionary entry for "superficial" will show it as an adjective.

Here's why:

* Adjectives describe nouns.

* "Superficial" is used to describe something that is shallow or lacking in depth.

* For example: "He had a superficial understanding of the topic."

You might also see the word listed as an adverb in some dictionaries, but this is less common. In this case, it would mean "on the surface" or "externally".