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Synonyms

father-in-law

American  
[fah-ther-in-law] / ˈfɑ ðər ɪnˌlɔ /

noun

fathers-in-law plural
  1. the father of one's spouse.


father-in-law British  

noun

  1. the father of one's wife or husband

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Noun Inflected Forms

Etymology

Origin of father-in-law

First recorded in 1350–1400; Middle English fader in lawe; see origin at father, in, law 1; from Middle English in-lawe “in law,” i.e., “a person within the regulation and protection of the law,” based on the prohibition by Roman civil law and, later, Christian canon law, of marriages within four degrees of consanguinity, i.e., up to and including first cousins

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

One man, Sergei, told Reuters his 83-year-old father in law spent three days in his attic in Oleshky before the water receded and he could come down.

From Reuters • Jun. 13, 2023

"My own father in law came out of a cafe in the village and was met by the sight - it is tragic," he said.

From BBC • Mar. 9, 2023

"Michael joins me in thanking you all for your overwhelming love, kind words and prayers since the passing of my father in law Kirk," wrote Zeta-Jones in the caption.

From Fox News • Feb. 9, 2020

Rosenberg: You have many fans some of whom know this many of whom I assume do not, but your father in law Bob’s father, was also a judge.

From MSNBC • Oct. 2, 2019

In our age, on the contrary, enlightened men have often pronounced, with regret, that, on this one point, William appears to disadvantage when compared with his father in law.

From The History of England, from the Accession of James II — Volume 2 by Macaulay, Thomas Babington Macaulay, Baron

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