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

 

subset

 noun
noun
BrE BrE//ˈsʌbset//
 
; NAmE NAmE//ˈsʌbset//
 
(specialist)
 
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a smaller group of people or things formed from the members of a larger group a subset of the people who took part in the survey
See the Oxford Advanced American Dictionary entry: subset