border² v [T] 1 to be in a line around the edge of something 形成…的边界，毗邻: willow trees bordering the river 河边的柳树 2 to share a border with another country 与〔另一国家〕接壤: the Arab States bordering Israel 与以色列接壤的阿拉伯国家
border on sth to be very nearly a particular kind of behaviour, attitude, feeling etc 近似，接近: Her behaviour often borders on insanity. 她的行为近乎疯狂。