[ des-il, -ahyl ]
/ ˈdɛs ɪl, -aɪl /

noun Statistics.

one of the values of a variable that divides the distribution of the variable into ten groups having equal frequencies.

Origin of decile

First recorded in 1880–85; dec- + -ile Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Examples from the Web for decile

British Dictionary definitions for decile

/ (ˈdɛsɪl, -aɪl) /


  1. one of nine actual or notional values of a variable dividing its distribution into ten groups with equal frequencies: the ninth decile is the value below which 90% of the population lieSee also percentile
  2. a tenth part of a distribution

Word Origin for decile

C17: from deca- + -ile
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012