Here's how it breaks down:
Noun:
* Definition: Action that obstructs or prevents something, or the state of being obstructed.
* Example: "The neighbor's loud music was a constant interference."
Verb:
* Definition: To obstruct or prevent something.
* Example: "The government interfered in the election."
To determine if "interference" is being used as a noun or verb, you need to look at its function in the sentence.