Definitions for "Parallel processing"
A computing architecture that uses multiple processors operating in parallel. Gartner Dataquest defines parallel-processing configurations that use 32 or more processors as massively parallel processing (MPP) systems. See MPP.
Simultaneous processing by more than one processing unit on a single application
Arranging microprocessors in a parallel pattern rather than a serial pattern; parallel processing can greatly increase the speed of supercomputers. parallel processors Processors arranged in a parallel pattern to increase the MIPS the computer can accomplish.
Keywords:  sysplex
A step in an application that branches between two or more branches so that two or more activities can execute in parallel.