A partaker; a person having an interest in any action or thing; one who has an interest in an estate created by another; a person having an interest derived from a contract or conveyance to which he is not himself a party
If you are privy to something secret, you have been allowed to know about it. Only three people, including a policeman, will be privy to the facts. privies a toilet, especially one outside a house in a small separate building