WordWeb Online

1. Exclude from a church or a religious community
   "The gay priest was excommunicated when he married his partner";
   - unchurch, curse
    
2. Oust or exclude from a group or membership by decree

Derived forms: excommunicated, excommunicates, excommunicating

Type of: boot out [informal], drum out, exclude, expel, keep out, kick out [informal], oust, shut, shut out, throw out, turf out [Brit, informal]

Antonym: communicate

Encyclopedia: Excommunicate