/ Dictionary / Index S Sulu: Meaning and Definition of Find definitions for: Su•lu Pronunciation: (s'l), [key] — pl. -lus, -lu. a member of the most numerous tribe of Moros, living chiefly in the Sulu Archipelago. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sultry Sulu Archipelago Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language