Definition of FID DEF from the Oxford Advanced Learner's Dictionary

 

FID DEF

 
BrE
 
; NAmE
 
(also FD)
 
jump to other results
an abbreviation of the Latin phrase Fidei Defensor, which means 'Defender of the Faith', a title originally given to Henry VIII by the Pope for defending the Roman Catholic religion. When he created the Church of England he kept the title, referring to the new religion. The phrase appears on most British coins.