A person entrusted with the custody or care of something or someone; a caretaker or keeper.
a janitor; a cleaner
One who holds the key to a building etc. for security reasons.
A device or component for holding a key.
The individual or organisation with access to a cryptographic key.
A dominant partner who controls whether their submissive partner is able or allowed to orgasm or receive sexual stimulation, typically by locking the submissive partner in a chastity belt or chastity cage.