Capable of being maintained or kept in good condition. The maintainable garden required minimal effort to keep it looking beautiful throughout the year.
Able to be supported or upheld, especially in terms of argument or position. The lawyer presented a maintainable argument that convinced the jury of the defendant's innocence.
Easily modified, extended, or debugged, especially in the context of software or technical systems. Clean code with thorough documentation is far more maintainable than tangled, uncommented code.