1. to officially exclude or expel (a person) from membership in a church or religious community, typically as a punishment for heresy or serious misconduct
Usage: formal; religious context
2. to exclude or bar (a person) from a group, organization, or community
Usage: figurative; extended use

Examples

• The church excommunicates members who violate its core doctrines.
• In the 16th century, the Pope excommunicates Martin Luther for his religious reforms.
• The organization excommunicates anyone found guilty of serious ethical violations.
• He was excommunicated from the community after his public scandal.
• The bishop excommunicates the priest for refusing to follow church law.
• Some religious groups excommunicate members who marry outside the faith.