/ˌəʊ ˈpeə(r) ||; o ˈpɛr/noun (Brit 英) [C] a person, usually a girl, from another country who comes to live with a family in order to learn the language. An au pair helps to clean the house and looks after the children. 换工寄宿的人（为学习当地语言而到外国家庭居住的人，通常是女孩子。住宿时须帮忙打扫卫生及照顾小孩）