noun (n)

• a ceremony to honor the memory of someone or something(noun.event)

  Synonym:
  memorialisation, memorialization
  

  source: wordnet30
• a recognition of meritorious service(noun.communication)

  Synonym:
  memorial, remembrance
  

  source: wordnet30
• The act of commemorating; an observance or celebration designed to honor the memory of some person or event.(noun)

  source: webster1913