LOCATIO REI, contracts. A term used in the civil law, which signifies the hiring of a thing. It is a contract by which one of the parties obligates himself to, give to the other the use and enjoyment, of a certain thing for a period of time agreed upon between them, and in consideration of a price which the latter binds himself to pay in return. Poth. Contr. de Louage, n. l. See Bailment; Hire; Hirer; Letter.