/ Dictionary / Index S San Mateo: Meaning and Definition of Find definitions for: San Ma•te•o Pronunciation: (san" mu-tā'ō), [key] a city in W California. 77,561. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. San Martín Sanmicheli Related Content Daily Word Quiz: illegible Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language