What part of speech is the word possible?

The word "possible" can be a few different parts of speech depending on its function in a sentence:

* Adjective: Describing a noun. Example: "It's a possible solution."

* Noun: Referring to something that is possible. Example: "The possible outcomes are many."

* Adverb: Modifying a verb, adjective, or another adverb. Example: "It is possibly the best option."

So, to determine the part of speech for "possible," you need to consider its role in the specific sentence.