1. to exclude someone from a group or society by general consent
Usage: British spelling; third person singular present tense

Examples

• The community ostracises anyone who breaks their traditional values.
• She ostracises former friends who disagree with her political views.
• The school ostracises students who engage in bullying behavior.
• He ostracises colleagues who don’t support his business decisions.
• The group ostracises members who reveal confidential information.
• The village ostracises families who don’t participate in local customs.