Source : WordNet®

sync
     v : make synchronous and adjust in time or manner; "Let's
         synchronize our efforts" [syn: {synchronize}, {synchronise}]
         [ant: {desynchronize}, {desynchronize}]

Source : Free On-Line Dictionary of Computing

sync
     
        /sink/ (Or "synch") 1. To synchronise, to bring into
        synchronisation.
     
        2.  To force ("{flush}") all pending buffered
        disk writes to the disk.
     
        3. More generally, to force a number of competing processes or
        agents to a state that would be "safe" if the system were to
        crash, i.e. to {checkpoint} in the {database} sense.
     
        [{Jargon File}]
     
        (1994-11-11)