Sulu noun2 •A province of Mindanao, Philippines. Capital: Jolo & Patikul. •A member of a prominent Moro tribe, occupying the Sulu Archipelago.That is the reason why the Sulu people have the right, and that they came to make the dredge (badja) to get the mother-of-pearl shell from the deep, because they can not see them. — 1908 formsSulus