any of the various possible ordered arrangements of a set of objects, numbers, letters, etc, or the changing from one to another of these: compare combination
a variation or change, e.g. in character or condition, brought about by rearrangement of existing elements
Brit a combination of teams that can be chosen in the football pools
permutational adj
[Middle English permutacioun exchange, transformation, via French from Latin permutation-, permutatio, from permutare: see permute]