(sisters-in-law)
Someone’s ~ is the sister of their husband or wife, or the woman who is married to their brother.
N-COUNT: oft poss N
(sisters-in-law)
Someone’s ~ is the sister of their husband or wife, or the woman who is married to their brother.
N-COUNT: oft poss N
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012