- substitution, permutation, transposition, replacement, switch - an event in which one thing is substituted for another; "the replacement of lost blood by a transfusion of donor blood"
 --1 is a kind of variation, fluctuation
 
- permutation - the act of changing the arrangement of a given number of elements
 --2 is a kind of mathematical process, mathematical operation, operation
 Derived form: verb permute1 
- permutation - complete change in character or condition; "the permutations...taking place in the physical world"- Henry Miller
 --3 is a kind of transformation, translation
 
- permutation - act of changing the lineal order of objects in a group
 --4 is a kind of reordering
 Derived form: verb permute1 
- permutation - act of changing the lineal order of objects in a group