Prince is a title of nobility, usually referring to the son of a king or queen.
In modern usage, Prince can also mean:
1. The famous American musician Prince Rogers Nelson
2. A term of endearment for a charming man (Hey, my prince!)
3. In some contexts, it can refer to a powerful or influential person in a particular field (He's the prince of Wall Street)
4. The male lead in fairy tales (Snow White and the Prince)