/ Dictionary / Index F flat-earther: Meaning and Definition of Find definitions for: flat-earth•er Pronunciation: (flat'ûr'thur), [key] — n. a person who adheres to the idea that the earth is flat. a person who clings to an idea or theory that has long been proved wrong. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. flat-coated retriever flat-felled seam Related Content Daily Word Quiz: penury Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language