/ Dictionary / Index T thirty-third: Meaning and Definition of Find definitions for: thir•ty-third Pronunciation: (thûr'tē-thûrd'), [key] — adj. next after the thirty-second; being the ordinal number for 33. being one of 33 equal parts. —n. a thirty-third part, esp. of one (). the thirty-third member of a series. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: thirty-third (Thesaurus) thirty-sixth Thirty-thirty. Related Content Daily Word Quiz: resilient Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language