Father-in-law
Pronunciation : Fa"ther-in-law`
Part of Speech : n.;
Definition : Defn: The father of one's husband or wife; -- correlative to son-in- law and daughter-in-law.
Note: A man who marries a woman having children already, is sometimes, though erroneously, called their father-in-law.
pl. Fathers-in-law (.
Source : Webster's Unabridged Dictionary, 1913