someone, especially in the past, who was paid to clean someone’s house, cook for them, answer the door etc, and who often lived in the house.——朗文当代大辞典

A personal or domestic attendant; one whose duty is to wait upon his master or mistress, or do certain work in his or her household. (The usual sense when no other is indicated by the context; sometimes with defining word, as domestic servant.)——牛津当代大辞典  @en