* Noun: This is the most common usage, referring to a piece of rock.
* Example: "He threw a stone at the window."
* Verb: Meaning to throw stones at something.
* Example: "The children stoned the fruit on the tree."
* Adjective: Meaning made of or resembling stone.
* Example: "The building had a stone facade."
It's important to note that the part of speech "stone" plays depends on its context within a sentence.