* Noun: This is the most common usage. It refers to the grain itself.
* Example: "I had a bowl of rice for dinner."
* Adjective: It can describe something made from rice.
* Example: "We ate rice pudding for dessert."
* Verb: This is less common, but it can mean to grow rice.
* Example: "The farmers rice the fields in the spring."
So, to determine the part of speech, you need to look at the context of the sentence.