/ Dictionary / Index T twenty-sixth: Meaning and Definition of Find definitions for: twen•ty-sixth Pronunciation: (twen'tē-siksth', twun'-), [key] — adj. next after the twenty-fifth; being the ordinal number for 26. being one of 26 equal parts. —n. a twenty-sixth part, esp. of one (). the twenty-sixth member of a series. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: twenty-sixth (Thesaurus) twenty-six Twenty-sixth Amendment Related Content Daily Word Quiz: apogee Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language