Noun

• S: (n) introduction, debut, first appearance, launching, unveiling, entry (the act of beginning something new) "they looked forward to the debut of their new product line"
• S: (n) introduction (the first section of a communication)
• S: (n) presentation, introduction, intro (formally making a person known to another or to the public)
• S: (n) introduction (a basic or elementary instructional text)
• S: (n) introduction (a new proposal) "they resisted the introduction of impractical alternatives"
• S: (n) insertion, introduction, intromission (the act of putting one thing into another)
• S: (n) 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"