locator (loh-kay-t<<schwa>>r), n.[Latin] 1.Roman law. (usu. ital.) One who lets out property or services for reward, or who contracts to have another person (the conductor) perform work for reward; a lessor or landlord. See CONDUCTOR(2).

locator operarum,n. One who offers one’s labor for hire, esp. as a day laboror. locator operas faciendi,n. One who employs contract labor. locator rei,n. A lessor or landlord.

2. One who is entitled to locate land or set the boundaries of a mining claim.
[Blacks Law 8th]