Definition of FIL in English:
A person’s father-in-law: my in-laws helped tremendously—my MIL prepared food and my FIL helped move boxes and furniture
More example sentences
- I'm sure your FIL was trying to be helpful.
- My FIL pays $150 a month to keep more stuff in a storage unit than he can fit in his already overcrowded townhouse.
- My divorced parents lived 1700 miles away, my FIL lives 3000 miles away, and my MIL lives 100 miles away.
Definition of FIL in:
- US English dictionary