/ Dictionary / Index S supergiant: Meaning and Definition of Find definitions for: su•per•gi•ant Pronunciation: (s'pur-jī"unt), [key] — n. See an extremely large or powerful person, company, thing, etc. —adj. extremely large; immense. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: supergiant (Thesaurus) supergene super giant slalom Related Content Daily Word Quiz: hedonist Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language