Fr.

• Fr
• FR

Fr.

1. (law) Abbreviation of France.
2. Abbreviation of Friday.

(France): This is the customary abbreviation of this term as used in case citations. See, e.g., The Bluebook: A Uniform System of Citation, Nineteenth Edition (2010), "Geographical Terms: Foreign countries and regions", Table T10.3, p. 438-443.

Fr.

1. Abbreviation of Father, a title given to priests.
   • 2017 December 16, “These priests were martyred for refusing to violate the seal of confession”, in Catholic News Agency‎^[1]:

     There, a Franciscan friar named Andrés Ivars asked that Fr. Císcar hear his confession before the friar was executed be firing squad.

In formal contexts, Rev. is often preferred.

• R&F, RF, rf

Fr.

1. abbreviation of Frans

Fr.

1. abbreviation of Frau (“Mistress, Mrs, woman, wife”)
2. abbreviation of Freitag (“Friday”)
3. abbreviation of Franken (“(Swiss) franc”)

(Frau): Frl.

(Freitag): Mo., Di., Mi., Do., Sa., So.

• “Fr.” in Duden online