姨妹 yímèi sister-in-law Definitions Defs Origin Strokes Stroke Words Sentences Sents yímèi sister-in-law 姨 yí sister-in-law (bound form) a wife's sister妹 mèi noun younger sister (bound form) younger sister; a female relative of the same generation who is younger than oneselfyímèi maternal cousin 姨 yí noun maternal aunt one's mother's sister; maternal aunt妹 mèi noun younger sister (bound form) younger sister; a female relative of the same generation who is younger than oneself