/ Dictionary / Index S Sunnyvale: Meaning and Definition of Find definitions for: Sun•ny•vale Pronunciation: (sun'ē-vāl"), [key] — n. a city in central California, south of San Francisco. 106,618. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sunnyside up sun pan 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