What part of speech is the word grade?

The word "grade" can be several parts of speech depending on its use in a sentence:

* Noun: A level of academic achievement (e.g., "I got an A grade on the test.")

* Noun: A slope or incline (e.g., "The road had a steep grade.")

* Verb: To assign a grade to (e.g., "The teacher graded our essays.")

* Verb: To classify or sort (e.g., "The eggs were graded by size.")

So, without a sentence to provide context, it's impossible to say definitively what part of speech "grade" is.