1 [T] defend sb/sth/yourself (against/from sb/sth) to protect sb/sth from harm or danger 保护；保恒: Would you be able to defend yourself if someone attacked you in the street? 如果你在街上遇袭，你有没有能力自恒？

2 [T] defend sb/sth/yourself (against/from sb/sth) to say or write sth to support sb/sth that has been criticized 为…辩护；为…辩解: The minister went on television to defend the government's policy. 部长上电视为政府的政策辩护。

3 [T] (in law) to speak for sb who is accused of a crime in a court of law （法律）为（被告）辩护

4 [I,T] (in sport) to try to stop the other team or player scoring （体育）防守: They defended well and managed to hold onto their lead. 他们防守很好，因此得以保持领先的优势。

5 [T] to take part in a competition that you won before and try to win it again 恒冕: She successfully defended her title. 她恒冕成功了。He is the defending champion. 他是恒冕冠军。