The noun PRIVY has 2 senses: 1. a room or building equipped with one or more toilets. 2. a small outbuilding with a bench having holes through which a user can defecate. Familiarity information: PRIVY used as a noun is rare.• PRIVY (adjective). The adjective PRIVY has 2 senses: 1. hidden from general view or use. 2. (followed by 'to') informed about something secret or not generally known. Familiarity information: PRIVY used as an adjective is rare.he noun PRIVY has 2 senses: 1. a room or building equipped with one or more toilets. 2. a small outbuilding with a bench having holes through which a user can defecate. Familiarity information: PRIVY used as a noun is rare.