Prophet
A prophet tells the future and it comes true. He can also give advice in worldly matters, more than just a wise person, who can give advice in spiritual matters. The Alter Rebbe (first Chabad Rebbe) complained that people were asking him for advice in worldly matters, when they should only be asking prophets these things. But after that, he did answer such questions. This shows that he was a prophet! He also told the future accurately. The subsequent Chabad Rebbes did so as well. The Rambam says that prophecy will return as an introduction to Moshiach. In our generation, the Rebbe King Moshiach Shlita is the prophet, and his majesty is saying as prophecy – which means that it is certain – that the Redemption is imminent!
(See talk of the Lubavitcher Rebbe King Moshiach Shlita, Shoftim 5751 (1991))