* Noun: This is the most common usage. It refers to the plural form of the animal "pig".
* Example: "The pigs were rooting in the mud."
* Adjective: "Pigs" can be used as an adjective to describe something related to pigs, such as a pig farm or pig food.
* Example: "The pigs farm was located on the outskirts of town."
* Verb: In rare cases, "pigs" can be used as a verb, typically in the slang phrase "to pig out", which means to eat a lot of food.
* Example: "We pigged out on pizza after the game."
So, to determine the part of speech, you need to look at the sentence and how the word is being used.