daughter-in-lawEnglishMerriam-Webster Dictionarydaughter-in-law noundaugh·ter-in-law | \ ˈdȯ-tər-in-ˌlȯ , ˈdȯ-tərn- \ the wife of one's son or daughter plural daughters-in-law \ ˈdȯ-tər-zin-ˌlȯ \ Definition : the wife of one's son or daughterFirst Known Use14th century, in the meaning defined abovedaughter-in-law noundaugh·ter-in-law | \ ˈdȯ-tər-in-ˌlȯ , ˈdȯ-tərn- \ the wife of one's son or daughter plural daughters-in-law \ ˈdȯ-tər-zin-ˌlȯ \ Definition : the wife of one's son or daughterFirst Known Use14th century, in the meaning defined above