Definition(s):
“modification of a software product, performed after delivery, to keep a software product usable in a changed or changing environment”
“Note 1 to entry: Adaptive maintenance provides enhancements (3.1.7) necessary to accommodate changes in the environment in which a software product operates. These changes help keep pace with the changing environment, e.g. an upgrade to the operating system results in changes in the applications.”
(ISO/IEC/IEEE 14764:2002)