1. "Wealth" or "riches": This is the more common meaning of the word, and it's related to the god Pluto's association with the underworld and its hidden treasures.
2. "The god of the underworld": This meaning is specific to the god Pluto, who was the Roman equivalent of the Greek god Hades.
It's important to note that "Pluto" is not the original Roman word for the god of the underworld. In earlier times, he was known as "Dis", which means "the rich one" or "the wealthy one." The name "Pluto" became more prevalent later in Roman history, perhaps due to its connection to the god's wealth and association with the underworld's treasures.