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Synonyms

father-in-law

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

noun

PLURAL

fathers-in-law
  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

Etymology

Origin of father-in-law

First recorded in 1350–1400; Middle English fader in lawe; 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.

My father-in-law retired at age 62 from a company he worked for for 35 years.

From MarketWatch

He consulted his father-in-law, a naturalist, who broke the news to him: “Ladybugs are like cockroaches, but with better presentation.”

From The Wall Street Journal

Monroe, 38, did much of the repair work herself while she, her husband and toddler stayed with her father-in-law.

From The Wall Street Journal

“My father-in-law was sick, Covid was under way, and we were in a bad place. I started ‘The Correspondent’ as an exercise, never planning to show it to anyone.”

From The Wall Street Journal

My father-in-law would now like to move back to the States and live full time, so we all would like to move somewhere warmer and are thinking it will be South Carolina or Texas.

From MarketWatch