/ Dictionary / Index T twenty-seven: Meaning and Definition of Find definitions for: twen•ty-sev•en Pronunciation: (twen'tē-sev'un, twun'-), [key] — n. a cardinal number, 20 plus 7. a symbol for this number, as 27 or XXVII. a set of this many persons or things. —adj. amounting to 27 in number. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: twenty-seven (Thesaurus) Twenty-second Amendment twenty-seventh Related Content Daily Word Quiz: cur Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language