What part of speech is the word question?

The word "question" can be multiple parts of speech, depending on its function in a sentence:

* Noun: This is the most common usage. It refers to a sentence or phrase that asks for information.

* Example: "I have a question about the homework."

* Verb: It can mean to ask a question or to express doubt.

* Example: "Don't question my authority!"

* Adjective: It can mean doubtful or uncertain.

* Example: "The future is questionable."

So, to determine the part of speech of "question", you need to look at its context in the sentence.