1. (noun)prayer, supplication 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 prayer"
2. (noun)prayer, petition, orison reverent petition to a deity
3. (noun)entreaty, prayer, appeal earnest or urgent request "an entreaty to stop the fighting"; "an appeal for help"; "an appeal to the public to keep calm"