Definition of "Initiate" :

noun: people who have been introduced to the mysteries of some field or activity

"It is very familiar to the initiate."

noun: someone who has been admitted to membership in a scholarly field

noun: someone new to a field or activity

verb: set in motion, start an event or prepare the way for

verb: bring up a topic for discussion

verb: bring into being

"He initiated a new program."

verb: take the lead or initiative in; participate in the development of

verb: accept people into an exclusive society or group, usually with some rite

"African men are initiated when they reach puberty."