/ Dictionary / Index R Rancho Cucamonga: Meaning and Definition of Find definitions for: Ran'cho Cu•ca•mon'ga Pronunciation: (k"ku-mung'gu, -mong'-), [key] a city in SE California. 55,250. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Rancho Cordova Rancho Palos Verdes Related Content Daily Word Quiz: agitated Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language