Definition of FIL in English:

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FIL

noun

informal
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 hope we can reschedule my FIL's long-awaited trip to see us.
  • On my last trip to my in-laws' place, my FIL actually told me that I was disrespecting him by not wearing a bindi!
  • D wanted to sleep in today, and since there will only be us and my FIL for dinner today and I could do this menu in my sleep, I said that was fine.

Origin

1960s: abbreviation.

For editors and proofreaders

Line breaks: FIL

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