Initiation (noun)

1. The process of being formally introduced or admitted to a particular organization or activity.
2. The action of starting or introducing something.
3. The action of making someone a member of a society, club, or secret organization.
4. The first stage in a process or series of events.

Origin:

Late middle english: from latin initiatio(n-), from the verb initiare "begin, set going", from initium "a beginning".

Examples:

1. The initiation ceremony for new members of the fraternity was held last night.
2. The initiation of the new project was delayed due to budget constraints.
3. The initiation of the new policy has been met with opposition from some employees.
4. The initiation of the treaty marked the beginning of a new era of peace and cooperation.
5. The initiation of the program has led to significant improvements in student performance.