Meaning of “ostracize” - Learner’s Dictionary

ostracize

verb [ T ] also UK -ise us uk /ˈɒstrəsaɪz/

When a group of people ostracizes someone, they refuse to talk to or do things with that person:

[ often passive ] He was ostracized by the other children at school.

(Definition of “ostracize” from the Cambridge Learner’s Dictionary © Cambridge University Press)