Source : WordNet®

processor
     n 1: a business engaged in processing agricultural products and
          preparing them for market
     2: someone who processes things (foods or photographs or
        applicants etc.)
     3: (computer science) the part of a computer (a microprocessor
        chip) that does most of the data processing; the CPU and
        the memory form the central part of a computer to which
        the peripherals are attached [syn: {central processing
        unit}, {CPU}, {C.P.U.}, {central processor}, {mainframe}]

Source : Free On-Line Dictionary of Computing

processor
     
        {central processing unit}