noun (n)

• a prayer asking God's help as part of a religious service(noun.communication)

  Synonym:
  supplication
  

  source: wordnet30
• an incantation used in conjuring or summoning a devil(noun.communication)

  source: wordnet30
• calling up a spirit or devil(noun.cognition)

  Synonym:
  conjuration, conjuring, conjury
  

  source: wordnet30
• the act of appealing for help(noun.act)

  source: wordnet30
• The act or form of calling for the assistance or presence of some superior being; earnest and solemn entreaty; esp., prayer offered to a divine being.(noun)

  source: webster1913