Meaning of PERMUTATION in English

PERMUTATION

noun barter; exchange.

2. permutation ·noun any one of such possible arrangements.

3. permutation ·noun the act of permuting; exchange of the thing for another; mutual transference; interchange.

4. permutation ·noun 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, ·noun, 4.

Webster English vocab.      Английский словарь Webster.