Nevada Revised Statutes
Chapter 208 - General Provisions
NRS 208.075 - "Prison" defined.

"Prison" means any place designated by law for the keeping of persons held in custody under process of law, or under lawful arrest.
[Part 1911 C&P § 29; RL § 6294; NCL § 9978]—(NRS A 1973, 355; 1983, 815; 1985, 510)