noun (n)

• an established ceremony prescribed by a religion(noun.act)

  Example:
  The rite of baptism.
  

  Synonym:
  religious rite
  

  source: wordnet30
• any customary observance or practice(noun.act)

  Synonym:
  ritual
  

  source: wordnet30
• The act of performing divine or solemn service, as established by law, precept, or custom; a formal act of religion or other solemn duty; a solemn observance; a ceremony; as, the rites of freemasonry.(noun)

  source: webster1913