1. The evening star: In ancient Greek and Roman mythology, Hesperus was the personification of the evening star, which is actually the planet Venus when it appears in the western sky after sunset.
2. The west: Hesperus is also sometimes used to refer to the west, especially in poetic or literary contexts. This is because the evening star appears in the western sky.
So, depending on the context, "Hesperus" can refer to either the planet Venus as seen in the evening sky or the direction of the west.