What does jealousy mean?
negative thoughts and feelings of insecurity, fear, and anxiety
dictionary definition: 1 Feeling or showing envy of someone or their achievements and advantages.2 Feeling or showing suspicion of someone's unfaithfulness in a relationship.
It shows insecurity.
Rather that you care, or you really despise someone only because they have something you want.
Jealousy is an emotion. Example: How you would feel if your best friend was dating Justin Bieber.
Means you're insecure.
Jealous mean anxiety. I'm pretty sure that's the American definition. I don't live in America, that's why I don't know the definition.