formation/fɔrˋmeʃən; fɔːˈmeIʃ$n/n 1 [U] the process by which something starts or develops 组成﹐形成: +of the formation of a new government 新政府的组成2 [C,U] the shape in which something is made or exists 形状﹔结构﹔排列: rock formations 岩层aircraft flying in formation (=in a pattern) 编队飞行的飞机