/ Dictionary / Index W Wintu: Meaning and Definition of Find definitions for: Win•tu Pronunciation: (win-t', win't), [key] — pl. -tus, -tu a member of an American Indian people of the Sacramento River valley in California. the Wintun language of the Wintu. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. wintry Wintun Related Content Daily Word Quiz: tactful Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language