(especially in some societies in the past) a woman who lives with a man, often in addition to his wife or wives, but who is less important than they are (尤指旧时某些社会里的)妾,姨太太,小老婆 The sultan’s wives and concubines lived in the harem. 苏丹的妻妾都住在女眷内室里。
Word OriginMiddle English: from Old French, from Latin concubina, from con- ‘with’ + cubare ‘to lie’.