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

 

ostracism

 noun
noun
BrE BrE//ˈɒstrəsɪzəm//
 
; NAmE NAmE//ˈɑːstrəsɪzəm//
 
[uncountable](formal)
 
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the act of deliberately not including somebody in a group or activity; the state of not being included
See the Oxford Advanced American Dictionary entry: ostracism