FID DEF
/ˌfɪd ˈdef/
/ˌfɪd ˈdef/
(also FD)
- 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.