/ Dictionary / Index S San Jacinto: Meaning and Definition of Find definitions for: San Ja•cin•to Pronunciation: (san" ju-sin'tō), [key] a river in E Texas, flowing SE to Galveston Bay: Texans defeated Mexicans near the mouth of this river 1836. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sanity San Jacinto Day Related Content Daily Word Quiz: philanthropy Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language