privacy (n.) Look up privacy at Dictionary.com
1590s, "a private matter, a secret;" c.1600 as "seclusion," from private (adj.) + -cy. Meaning "state of freedom from intrusion" is from 1814. Earlier was privatie (late 14c. as "secret, mystery;" c.1400 as "a secret, secret deed; solitude, privacy"), from Old French privauté.