What part of speech is the word formal?

The word "formal" can be several parts of speech, depending on its use in a sentence:

* Adjective: Describing something as following established rules or conventions.

* Example: "We had a formal dinner party."

* Noun: A formal event or occasion.

* Example: "The ball was a formal affair."

* Adverb: In a formal manner.

* Example: "They spoke formally to the judges."

Let me know if you'd like an example sentence using "formal" in a specific part of speech!