1. (statistics) any of the five equals parts into which a sample population can be divided depending on the value of a variable
   "The study examined income distribution across quintiles of the population"
    
2. One of five equal groups into which a population can be divided according to the distribution of values of a particular variable
   "The study divided household incomes into quintiles"
    
3. (astrology) an aspect of two celestial bodies when they are 72 degrees apart
   "The quintile aspect is considered minor but harmonious in astrological interpretations"

Derived forms: quintiles

Encyclopedia: Quintile