the side of an object that is opposite its front; rear, backside
his room was toward the rear of the hotel
Microsoft Computer Dictionary
n. 1. In a client/server application, the part of the program that runs on the server. See also client/server architecture. Compare front end. 2. In networking, a server computer or the processing that takes place on it. 3. The part of a compiler that transforms source code (human-readable program statements) into object code (machine-readable code). See also compiler (definition 2), object code, source code.