permutation

noun

1. 1

   act of changing the lineal order of objects in a group

2. 2

   complete change in character or condition

   the permutations...taking place in the physical world"- Henry Miller

3. 3

   the act of changing the arrangement of a given number of elements

4. 4

   an event in which one thing is substituted for another

   the replacement of lost blood by a transfusion of donor blood