/ Dictionary / Index S scallion: Meaning and Definition of Find definitions for: scal•lion Pronunciation: (skal'yun), [key] — n. any onion that does not form a large bulb; green onion. a shallot. a leek. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: scallion (Thesaurus) scalled scallop Related Content Daily Word Quiz: eccentric Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language