Hip-hop dance is a dynamic, expressive street dance style  deeply rooted in hip-hop culture. It's characterized by its freestyle nature, improvisational movements, and close connection to hip-hop music. 

While it incorporates elements from various dance styles, including modern, tap, and swing, it's primarily defined by its unique vocabulary of moves like popping, locking, and breaking, often performed with an emphasis on rhythm, musicality, and individual expression.