to discharge (a person) from the armed forces; demobilize.
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British Dictionary definitions for demob
short for demobilize
short for demobilization: See demobilization
(as modifier): a demob suit
a soldier who has been demobilized
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