/ Dictionary / Index G gossan: Meaning and Definition of Find definitions for: gos•san Pronunciation: (gos'un, goz'-), [key] — n. a rust-colored deposit of mineral matter at the outcrop of a vein or orebody containing iron-bearing materials. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. gossamer Gosse Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language