- 1to refuse to let someone be a member of a social group; to refuse to meet or talk to someone synonym shun
- 2 He was ostracized by his colleagues for refusing to support the strike.
NAmE//ˈɑstrəˌsaɪz//ostracize somebody(formal)Verb Forms present simple I / you / we / they ostracize
he / she / it ostracizes
past simple ostracized
-ing form ostracizing