1. The Galaxy: This is the most common meaning. The Milky Way is the name of the spiral galaxy that our solar system resides in. It appears as a faint band of light across the night sky, which is why it was named "Milky Way" – because it resembles a river of spilled milk.

2. The Milky Way chocolate bar: This is a popular candy bar, and its name is derived from the galaxy. The bar is made of milk chocolate and was named for its similarity to the Milky Way's appearance.

So, when someone mentions "Milky Way," you need to consider the context to understand which meaning they are referring to.