* Noun: This is the most common usage. It refers to the act of arriving or the time when someone or something arrives.
* Example: "The arrival of the train was delayed."
* Verb: While less common, it can be used as a verb meaning "to arrive."
* Example: "The guests arrived late."
* Adjective: This is even less common, but "arrival" can be used as an adjective to describe something relating to arriving.
* Example: "The arrival gate was crowded."
So, to determine the part of speech, you need to look at the context of the sentence.