FD

UK:*UK and possibly other pronunciationsUK and possibly other pronunciations/ˌɛfˈdiː/


Collins Concise English Dictionary © HarperCollins Publishers::
FD
  1. Fidei Defensor
Etymology: Latin: Defender of the Faith
WordReference Random House Learner's Dictionary of American English © 2025
F.D.,  an abbreviation of:
  1. fire department.
  2. focal distance.

WordReference Random House Unabridged Dictionary of American English © 2025
F.D., 
    1. Fidei Defensor.
    2. fire department.
    3. focal distance.

'FD' also found in these entries (note: many are not synonyms or translations):
FD and C color - Fidei Defensor

Forum discussions with the word(s) "FD" in the title:


Look up "FD" at Merriam-Webster
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