[des-il, -ahyl]

noun Statistics.

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

Nearby words

  1. deciduous membrane,
  2. deciduous tooth,
  3. deciduous trees and shrubs,
  4. deciduously,
  5. decigram,
  6. deciliter,
  7. decilitre,
  8. decillion,
  9. decimal,
  10. decimal classification

Origin of decile

First recorded in 1880–85; dec- + -ile Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for decile

British Dictionary definitions for decile



  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

Word Origin and History for decile



1670s in astrology; 1882 in statistics; from French décile or Medieval Latin *decilis, from Latin decem "ten" (see ten) on the model of quintilis, sextilis.

Online Etymology Dictionary, © 2010 Douglas Harper