New American Dream Dictionary

by Joan Seaman - Tom Philbin
1. Disagreements, uncomfortable family situations requiring delicacy and tact.

2. Positive events happening.

3. Pleasant family relations (if father-in-law is happy).

Ten Thousand Dream Interpretation

by Gustavus Hindman Miller
To dream of your father-in-law, denotes contentions with friends or relatives.

To see him well and cheerful, foretells pleasant family relations.

Mystic Dream Book

by Internet Archive - Anonymous
To dream you see your Father-in- law, either dead or alive, signifies ill-luck, especially if he uses violence or is threatening.