Here's how to tell:
Noun:
* It names a place or event: "We had a productive meeting at the office."
* It can be singular or plural: "There were three meetings scheduled for this week."
Verb:
* It describes an action: "The team is meeting to discuss the project."
* It can be used in different tenses: "We met last week," "We are meeting tomorrow."
Let me know if you'd like more examples!