/ Dictionary / Index F forty-niner: Meaning and Definition of Find definitions for: for•ty-nin•er Pronunciation: (fôr"tē nī'nur), [key] — n. a person, esp. a prospector, who went to California in 1849 during the gold rush. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: forty-niner (Thesaurus) forty-nine forty-ninth Related Content Daily Word Quiz: eureka Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language