妹 mèi noun ① （妹妹） younger sister ▸ 小妹 youngest sister ▸ 兄妹 brother and sister → 妹夫, 表妹② （指同辈女子） address to a woman who is younger than the speaker and of the same generation → 师妹③ dialect （年轻女子） address to a young woman or girl ▸ 农家妹 country girl ▸ 外来妹 young female migrant |