Oxford Dictionary English in-laws nounnoun BrE BrE//ˈɪn lɔːz// ; NAmE NAmE//ˈɪn lɔːz// [plural] (informal) Marriage, Relations Add to my wordlistjump to other resultsyour relatives by marriage, especially the parents of your husband or wife We're visiting my in-laws on Sunday. Wordfinderfamilyadopt, child, family, generation, heir, in-laws, parent, relation, stepfamily, surrogate mother See related entries: Marriage, RelationsSee in-laws in the Oxford Advanced American DictionaryCheck pronunciation: in-laws oxfordlearnersdictionaries.com