* Adjective: Describing something as belonging to or characteristic of the present or recent times.
* Example: "She has a very modern apartment."
* Noun: Referring to the present or recent times.
* Example: "The art of the modern is often abstract."
* Adverb: Modifying a verb, adjective, or another adverb to indicate a connection to the present or recent times.
* Example: "He dresses very modern for his age."
Therefore, the part of speech for "modern" depends on its context in the sentence.