/ Dictionary / Index S Spanish onion: Meaning and Definition of Find definitions for: Span'ish on'ion Pronunciation: [key] a large-sized, mild, succulent onion, often eaten raw. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Spanish omelet Spanish oyster plant Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language