Definition of quartile noun from the Oxford Advanced Learner's Dictionary

 

quartile

 noun
noun
BrE BrE//ˈkwɔːtaɪl//
 
; NAmE NAmE//ˈkwɔːrtaɪl//
 
, NAmE//ˈkwɔːrtl//
 
(statistics)
 
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one of four equal groups into which a set of things can be divided according to the distribution of a particular variable women in the fourth quartile of height (= the shortest 25% of women) compare quintile Word Origin late 19th cent.: from medieval Latin quartilis, from Latin quartus ‘fourth’.
See the Oxford Advanced American Dictionary entry: quartile