What part of speech is genius?

"Genius" can be multiple parts of speech depending on its context:

* Noun: When referring to a person of exceptional intellectual ability or creative power.

* Example: "Einstein was a genius."

* Adjective: When describing something as exceptionally intelligent or brilliant.

* Example: "She had a genius plan to solve the problem."

It can also be used in less common ways as:

* Interjection: Expressing surprise or admiration.

* Example: "Genius! That's a brilliant idea!"

So, to determine the part of speech, you need to look at how it's used in a sentence.