/ Dictionary / Index W Watusi: Meaning and Definition of Find definitions for: Wa•tu•si Pronunciation: (wä-t'sē), [key] — pl. -sis, -si. Tutsi. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: watusi (Thesaurus) watt-second Waugh Related Content Daily Word Quiz: stringent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language