Meanings
-
1
noun
The father of your husband or wife.
My father-in-law invited us over for dinner on Sunday.
Thesaurus
Word family
Forms
father-in-lawsfathers-in-law
Derived forms
co-father-in-lawstepfather-in-law
Etymology
From Middle English fader in lawe, fadyr-in-lay, fader yn lawe, equivalent to father + -in-law.
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