* Noun: This is the most common use. It refers to a day or period of time set aside for celebration or rest.
* Example: "We're going on a holiday to the beach."
* Adjective: It can describe something related to a holiday.
* Example: "We're planning a holiday dinner."
* Verb (archaic): While not commonly used today, it can mean "to spend a holiday."
* Example: "They hollidayed in the Bahamas."
So, the part of speech depends on its usage in the sentence!