/ Dictionary / Index F forty-third: Meaning and Definition of Find definitions for: for•ty-third Pronunciation: (fôr'tē thûrd'), [key] — adj. next after the forty-second; being the ordinal number for 43. being one of 43 equal parts. —n. a forty-third part, esp. of one (). the forty-third member of a series. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: forty-third (Thesaurus) forty-sixth forty-three Related Content Daily Word Quiz: exemplary Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language