What is the meaning of initiation?

noun

• A formal entry into an organization or position or office.
  • usage: "his initiation into the club"; "he was ordered to report for induction into the army"; "he gave a speech as part of his installation into the hall of fame"
  • synonyms: induction, installation
• The act of starting something for the first time; introducing something new.
  • usage: "she looked forward to her initiation as an adult"; "the foundation of a new scientific society"
  • synonyms: founding, foundation, institution, origination, creation, innovation, introduction, instauration
• Wisdom as evidenced by the possession of knowledge.
  • usage: "his knowledgeability impressed me"; "his dullness was due to lack of initiation"
  • synonyms: knowledgeability, knowledgeableness
• An act that sets in motion some course of events.
  • synonyms: trigger, induction