n. 交换, 更动, 排列

[计] 排列

[化] 取代; 置换; 蜕变

[经] 排列, 置换, 重新配置

Permutation \Per`mu*ta"tion\, n. [L. permutatio: cf. F.
permutation. See {Permute}.]
1. The act of permuting; exchange of the thing for another;
mutual transference; interchange.

The violent convulsions and permutations that have
been made in property. --Burke.

2. (Math.)
(a) 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.
(b) Any one of such possible arrangements.

3. (Law) Barter; exchange.

{Permutation lock}, a lock in which the parts can be
transposed or shifted, so as to require different
arrangements of the tumblers on different occasions of
unlocking.