Being aware or knowledgeable of.
But a certain man named Ananias, with Sapphira his wife, sold a possession, and kept back part of the price, his wife also BEING PRIVY TO it, and brought a certain part, and laid it, at the apostles' feet. ( Acts 5:1-2 )
Bibliography Information"Entry for 'Privy, (being privy to)'". A King James Dictionary.