1) Call a dinner in advance 2) Reserve in advance 
In mathematics, especially in order theory, a preorder or quasiorder is a binary relation that is reflexive and transitive. All partial orders and equivalence relations are preorders, but preorders are more general. To every preorder, there corresponds a directed graph, with elements of the set corresponding to vertices, and the order relation bet...
• (v. t.) To order to arrange beforehand; to foreordain.
Pre·or'der transitive verb To order to arrange beforehand; to foreordain. Sir W. Hamilton.