What is initiatory?

Some articles on initiatory:

Giuliano Kremmerz - Biography
... known to scholars of magic hermeticism of that time as IZAR and in linked to the Italic roots of initiatory tradition – the tradition that, prior to Christianity, had flourished in Magna Graecia in the ... he controlled much of the Italic and neo-Egyptian hermetic initiatory tradition of that time ... laid the foundations for carrying the initiatory tradition into the new millennium, taking it back to the archetype – which, over the centuries, had become confused – of ...
Gardnerian Wicca - Beliefs and Practices - Covens and Initiatory Lines
... of British Traditional Wicca operate as an initiatory mystery cult membership is gained only through initiation by a Wiccan High Priestess or High Priest ... Any valid line of initiatory descent can be traced all the way back to Gerald Gardner, and through him back to the New Forest Coven ...