1. The father of your spouse
   "He nervously met his father-in-law for the first time at the wedding"

Derived forms: fathers-in-law

Type of: begetter [archaic], da [dialect, informal], dad [informal], dada [informal], daddy [informal], father, in-law, male parent, pa [informal], papa [informal], pappa [informal], pappy [informal], pop [informal], poppa [N. Amer, informal], relative-in-law

Encyclopedia: Father-in-law