/ ɪˌnɪʃiˈeɪʃn; NAmE / noun [ U ]
1.
initiation (into sth) the act of sb becoming a member of a group, often with a special ceremony; the act of introducing sb to an activity or skill :
an initiation ceremony
her initiation into the world of marketing
2.
( formal ) the act of starting sth :
the initiation of criminal proceedings