noun (n)

• the act of starting a new operation or practice(noun.act)

  Example:
  He opposed the inauguration of fluoridation.
  

  Synonym:
  startup
  

  source: wordnet30
• the ceremonial induction into a position(noun.act)

  Example:
  The new president obviously enjoyed his inauguration.
  

  Synonym:
  inaugural
  

  source: wordnet30
• The act of inuagurating, or inducting into office with solemnity; investiture by appropriate ceremonies.(noun)

  source: webster1913