Definition of quintile in English:

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Pronunciation: /ˈkwɪntɪl/


1 Statistics Any of five equal groups into which a population can be divided according to the distribution of values of a particular variable.
Example sentences
  • In 1980, a majority of voters in three out of five income quintiles reported choosing the Democratic candidate, and the fourth quintile was nearly tied.
  • The low level of wealth in at least the bottom two quintiles of the income distribution suggests that substantial numbers of people are likely to face such constraints.
  • The study grouped doctors into five quintiles by number of procedures a year: 1 to 33, 34 to 89, 90 to 139, 140 to 206 and 207 to 582.
1.1Each of the four values of the random variable which divide a population into quintiles.
Example sentences
  • They analyzed baseline serum vitamin A concentration in relation to risk for hip fractures as a continuous variable and by quintiles.
  • The terms tercile, quartile, quintile and decile should refer to the percentiles which divide the distribution into 3, 4, 5, or 10 equal parts, respectively.
  • As the NSW hospitals data had also been geo-coded, we could impute an EFI quintile for each patient, based on the actual distribution of SES at the Collection District-sex-age level.
2 [mass noun] Astrology An aspect of 72° (one fifth of a circle).
Example sentences
  • As it has then gone three fifths around the zodiac or 216°, that is three quintile divisions, in the other direction, it is again pointing towards Earth, and this is within less than one degree!
  • The quintile refers to knowing and the empowerment which comes from knowing.
  • That quintile between Pluto and Uranus met and re-met altogether five times (due to the retrograde motions), and Plutonium was created at the last of these five quintiles.


Early 17th century: from Latin quintilis (mensis) 'fifth month, July', from quintus 'fifth'.

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