/ Dictionary / Index S supercalifragilisticexpialidocious: Meaning and Definition of Find definitions for: su•per•cal•i•frag•i•lis•tic•ex•pi•al•i•do•cious Pronunciation: (s"pur-kal"u-fraj"u-lis"tik-ek"spē-al"i-dō'shus), [key] — adj. (used as a nonsense word by children to express approval or to represent the longest word in English.) Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. supercalender supercapital Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language