What part of speech is junior?

"Junior" can be a few different parts of speech depending on how it's used:

* Adjective: Describing someone younger than another person with the same name, especially a son.

* Example: "John Smith Junior"

* Noun: Referring to a student in a lower grade level, particularly in high school or college.

* Example: "He's a junior in college."

* Noun: Referring to a younger person in a particular group or organization.

* Example: "The junior members of the club."

It's important to look at the context of the sentence to determine which part of speech "junior" is functioning as.