- quintile⇄adj. of or having to do with quintiles; being a quintile.
- quintile⇄noun 1a. one of the points or marks dividing a frequency distribution into five parts, each having the same frequency.
b. any one of the five parts thus formed.
2. (Astrology.) the aspect of two heavenly bodies when their longitudes differ - quintile⇄quintile, noun, adjective.