/ Dictionary / Index S Simi Valley: Meaning and Definition of Find definitions for: Si•mi' Val'ley Pronunciation: (si-mē', sē'mē), [key] a city in SW California. 77,500. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. simitar Simla Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language