Definition of "decile" in English

noun

1. (statistics) Any of the values in a series that divides the distribution of individuals in that series into ten groups of equal frequency.

   • Although few people scored high marks, everyone did quite well—the lowest decile was over 50%.

2. Any one of the ten subsets or groups so divided.

   • Our school is in the top decile for exam results.

3. (astrology) An aspect or position of two planets when they are distant from each other a tenth part of the zodiac.