* Verb: This is the most common usage. It means to break into or stop something that is in progress.
* Noun: This usage refers to the action of interrupting itself.
* Adjective: This is less common, but can be used to describe something that is causing an interruption.
Here are some examples:
* Verb: "Please don't interrupt me while I'm working."
* Noun: "There was a sudden interrupt in the power supply."
* Adjective: "The interrupt signal caused the program to crash."
So, without context, you can't definitively say which part of speech "interrupt" is. You need to see the sentence to determine its function.