os ‧ tra ‧ cize BrE AmE ( also ostracise British English ) /ˈɒstrəsaɪz $ ˈɑː-/ verb [transitive]
[ Date: 1800-1900 ; Language: Greek ; Origin: ostrakizein 'to send away by voting with broken pieces of pot' , from ostrakon 'broken piece of pot' ]
if a group of people ostracize someone, they refuse to accept them as a member of the group:
She was afraid that if she spoke up her colleagues would ostracize her.
He was ostracized by the other students.
—ostracism /-sɪz ə m/ noun [uncountable] :
He suffered years of ostracism.