son-in-law

[ suhn-in-law ]

noun,plural sons-in-law.
  1. the husband of one's child.

Origin of son-in-law

1
First recorded in 1300–50; Middle English sone in lawe; see origin at son, in, law1; 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

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How to use son-in-law in a sentence

British Dictionary definitions for son-in-law

son-in-law

nounplural sons-in-law
  1. the husband of one's daughter

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