Father-In-Law
Defined in 2 dictionaries — Bouvier (1914), Black's (1910)
Bouvier's Law Dictionary and Concise Encyclopedia
John Bouvier; revised by Francis Rawle · 1914
The father of one’s spouse.
Black's Law Dictionary
Henry Campbell Black, M.A. · 1910
The father of one's wife or husband.
—rFntative father. The alleged or reputed father of an illegitimate child. State v. Nestaval, 72 Minn. 415, 75 N. W. 725.
Defined under Father in Black's Law Dictionary.