Source : Webster's Revised Unabridged Dictionary (1913)

Compatible \Com*pat"i*ble\, a. [F., fr. LL. compatibilis, fr. L.
   compati. See {Compassion}.]
   Capable of existing in harmony; congruous; suitable; not
   repugnant; -- usually followed by with.

         Our poets have joined together such qualities as are by
         nature the most compatible.              --Broome.

   Syn: Consistent; suitable; agreeable; accordant.

Source : WordNet®

compatible
     adj 1: able to exist and perform in harmonious or agreeable
            combination; "a compatible married couple"; "her deeds
            were compatible with her ideology" [ant: {incompatible}]
     2: having similar disposition and tastes; "a compatible married
        couple"; "with their many similar tastes, he found her a
        most sympathetic companion" [syn: {sympathetic}]
     3: capable of being used with or connected to other devices or
        components without modification [ant: {incompatible}]
     4: (of a couple) existing together harmoniously [syn: {well-matched}]
     5: capable of forming a homogeneous mixture that neither
        separates nor is altered by chemical interaction

Source : Free On-Line Dictionary of Computing

compatible
     
         Different systems (e.g., {programs}, {file formats},
        {protocols}, even {programming languages}) that can work
        together or exchange data are said to be compatible.
     
        See also {backward compatible}, {forward compatible}.
     
        (1998-01-15)