old or outdated software for which the publisher has discontinued updates, technical support, or distribution: This Japanese RPG is so old it’s technically abandonware, but I still love playing it.
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British Dictionary definitions for abandonware
computer software which is no longer sold or supported by its publisher
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012