permutation LpatmjuHeiJn; , prmis'te/sn/ n (maths) [U] change in the order of a set of things arranged in a group; [C] any one such arrangement: (數(shù)學(xué)) 排列; IS 換; 排列成之任一組： The ~s of x, y and z are xyz, xzy, yxz, yzx, zxy, zyx. x, y 和 z 的排列是 xyz, xzy, yxz, yzx, zxy, zyx。