/ Dictionary / Index D decile: Meaning and Definition of Find definitions for: dec•ile Pronunciation: (des'il, -īl), [key] — n. Statistics. one of the values of a variable that divides the distribution of the variable into ten groups having equal frequencies. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: decile (Thesaurus) decigram deciliter 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