/ Dictionary / Index E eighty-third: Meaning and Definition of Find definitions for: eight•y-third Pronunciation: (ā'tē thûrd'), [key] — adj. next after the eighty-second; being the ordinal number for 83. being one of 83 equal parts. —n. an eighty-third part, esp. of one (). the eighty-third member of a series. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. eighty-sixth eighty-three Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language