Phoenix \pho(e)-nix\ as a boy's name (also used as girl's name Phoenix), is of Greek origin, and the meaning of Phoenix is "dark red". The mythical Arabian bird known as the phoenix is a symbol of immortality. After living for centuries, it dies, and rises from its own ashes. Also the name of a city in the southwestern American state of Arizona. Actors Leaf, Joaquin, and the late River Phoenix.