Permutation

The act of permuting; exchange of the thing for another; mutual transference; interchange.

The arrangement of any determinate number of things, as units, objects, letters, etc., in all possible orders, one after the other; -- called also alternation. Cf. Combination, n., 4.

Any one of such possible arrangements.

Barter; exchange.

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

complete change in character or condition; "the permutations … taking place in the physical world" - Henry Miller