WordWeb Online

1. A prayer asking God's help as part of a religious service
   - invocation
    
2. A humble request for help from someone in authority
   - plea
    
3. The act of communicating with a deity (especially as a petition or in adoration or contrition or thanksgiving)
   "the priest sank to his knees in supplication";
   - prayer

Derived forms: supplications

Type of: appeal, entreaty, orison [archaic], petition, prayer, suppliance, worship

Part of: divine service, religious service, service

Encyclopedia: Supplication