initiationn.[L. initiatio: cf. F. initiation.]()1. The act of initiating, or the process of being initiated or introduced; as, initiation into a society, into business, literature, etc.(Pope.)2. The form or ceremony by which a person is introduced into any society; mode of entrance into an organized body; especially, the rite of admission into a secret society or order.()Silence is the first thing that is taught us at our initiation into sacred mysteries. (Broome.)