Here are some examples of how "stream" can be used as a noun:
* A body of water: "The children played in the cool, clear stream."
* A flow of something: "A constant stream of cars passed by."
* A series of data: "The company had a steady stream of new customers."
* A live broadcast: "I watched the live stream of the concert online."
However, "stream" can also be a verb. For example:
* To flow: "The river streams into the ocean."
* To broadcast online: "We'll stream the movie on our website."
So, whether "stream" is a noun or a verb depends on how it's used in a sentence.