1. (noun)initiation, induction, installation a formalentry into an organization or position or office "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"
2. (noun)initiation, founding, foundation, institution, origination, creation, innovation, introduction, instauration the act of starting something for the first time; introducing something new "she looked forward to her initiation as an adult"; "the foundation of a new scientific society"
3. (noun)knowledgeability, knowledgeableness, initiation wisdom as evidenced by the possession of knowledge "his knowledgeability impressed me"; "his dullness was due to lack of initiation"
4. (noun)trigger, induction, initiation an act that sets in motion some course of events