guard·i·an/`gɑrdɪən; ˈɡɑːdiən/ n [C] 1 someone who is legally responsible for someone else's child 〔小孩的〕监护人 2formal a person or organization that tries to protect laws, moral principles etc 【正式】 〔法律、道德等的〕维护者，保护者，捍卫者: The UN is the guardian of peace in the area. 联合国是这一地区的和平维持者。