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"
the act of putting one thing into another
a new proposal "they resisted the introduction of impractical alternatives"
a basic or elementary instructional text
formally making a person known to another or to the public
the first section of a communication
the act of beginning something new "they looked forward to the debut of their new product line" - first appearance