superficiary I. superficiaryadjective Etymology: Late Latin superficiarius built on another man's land, from Latin superficies surface, building on the surface of the ground + -arius -ary obsolete: superficial II. su·per·fi·ci·ary\-ˈfishēˌerē\noun (-es) Etymology: Late Latin superficiarius, from superficiarius built on another man's land Rom & civil law: one who has built on the soil of another usually by agreement with him for an annual rental