/ Dictionary / Index H Hermosillo: Meaning and Definition of Find definitions for: Her•mo•si•llo Pronunciation: (er"mô-sē'yô), [key] — n. a city in and the capital of Sonora, in NW Mexico. 281,300. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: hermosillo (Thesaurus) Hermosa Beach hern Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language