noun
Refers specifically to the father of one's wife. Used mainly in formal or written contexts; in casual speech, 義理の父 or 妻の父 are more common.
彼の岳父は元大学教授だ。
His father-in-law is a former university professor.
結婚式で岳父に挨拶をした。
I greeted my father-in-law at the wedding ceremony.