Fid. Def.
Fid. Def.
orFID DEF
abbreviation for
(Government, Politics & Diplomacy) Fidei Defensor
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014