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2017 Word of the Year

father-in-law

[fah-th er-in-law] /ˈfɑ ðər ɪnˌlɔ/
noun, plural fathers-in-law.
1.
the father of one's husband or wife.
Origin of father-in-law
1350-1400
Middle English word dating back to 1350-1400; See origin at father, in, law1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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British Dictionary definitions for father-in-law

father-in-law

noun (pl) fathers-in-law
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
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