Exact historical dictionary sense
Private in Webster's 1913 dictionary
The 1913 record labels private as adjective. Its source-bounded etymology and selected historical definition appear below.
[L. privatus apart from the state, peculiar to an individual, private, properly p. p. of privare to bereave, deprive, originally, to separate, fr. privus single, private, perhaps originally, put forward (hence, alone, single) and akin to prae before. See Prior, a., and cf. Deprive, Privy, a.]
Cross-verified historical senseIn Webster's Revised Unabridged Dictionary (1913), "private" is labeled adjective. Its etymology is recorded as: "[L. privatus apart from the state, peculiar to an individual, private, properly p. p. of privare to bereave, deprive, originally, to separate, fr. privus single, private, perhaps originally, put forward (hence, alone, single) and akin to prae before. See Prior, a., and cf. Deprive, Privy, a.]" The selected historical definition says: "Belonging to, or concerning, an individual person, company, or interest; peculiar to one's self; unconnected with others; personal; one's own; not public; not general; separate; as, a man's private opinion; private property; a private purse; private expenses or interests; a private secretary."