Father-in-law (noun)

1. The father of one's spouse.
2. The father of the person you are married to.

Origin:

Compound word of father + in + law, meaning "the father of one"s spouse".

Examples:

1. He was nervous about meeting his future father-in-law for the first time.
2. He and his father-in-law had a great relationship and often went fishing together.
3. His father-in-law was a successful businessman and gave him valuable advice.
4. He always felt that his father-in-law treated him like one of his own sons.
5. He was very close to his father-in-law and considered him a mentor.