柯林斯词典sister-in-law (sisters-in-law) 1. N-COUNT Someone's sister-in-law is the sister of their husband or wife, or the woman who is married to their brother. 丈夫的姐妹; 妻子的姐妹; 兄或弟的妻子 返回 sister-in-law剑桥词典the wife of your brother or sister , or the sister of your husband or wife , or the wife of the brother or sister of your husband or wife 嫂子；弟媳；大（或小）姑子；大（或小）姨子；妯娌；丈夫（或妻子）的嫂子（或弟媳） 返回 sister-in-law