[p_ˌɜː_m_j_uː_t_ˈeɪ_ʃ_ə_n], [pˌɜːmjuːtˈe͡ɪʃən], [pˌɜːmjuːtˈeɪʃən]
Definitions of permutation

an event in which one thing is substituted for another; " the replacement of lost blood by a transfusion of donor blood"

act of changing the lineal order of objects in a group

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

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

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

Any one of such possible arrangements.

Barter; exchange.

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.

The exchange of one thing for another; any one of the ways in which a number of objects, letters, numbers, etc., may be arranged or combined.

Act of changing one thing for another: ( math.) the arrangement of things or letters in every possible order.

Arrangement in every possible order; change of order.

Arrangement of a number of things in every possible order; interchange.

Exchange of one thing for another; change or different combination of any number of quantities.

The successive changing or varying the arrangement of letters or things in every possible order; a rule in algebra and in arithmetic.
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Usage examples for permutation

This indicates the distinction between the permutation of letters and the transition of letters. – The English Language by Robert Gordon Latham

Feelings were very deeply stirred, and people voted anti dog or pro dog, or pro two dogs, or pro or anti every possible combination and permutation of dogs. – A Prisoner in Turkey by John Still

But let none shift the burden on his shoulder At his arbitrament, without the turning Both of the white and of the yellow key; And every permutation deem as foolish, If in the substitute the thing relinquished, As the four is in six, be not contained. – DivineComedyLongfellowsTranslationComplete by Dante Alighieri

He says that every possible permutation of the four bells must be rung once, and once only. – Amusements in Mathematics by Henry Ernest Dudeney

The termination of the masculine is i, of the neuter u, and, as I have already observed, a permutation of the semi vowels l and r takes place, the letter becoming l in the masculine, r in the neuter. – The Arawack Language of Guiana in its Linguistic and Ethnological Relations by Daniel G. Brinton

Germany, in other words, is somewhat in arrears, as compared with those Europeans that have gone farthest along this course of institutional growth, or perhaps rather institutional permutation – An Inquiry Into The Nature Of Peace And The Terms Of Its Perpetuation by Thorstein Veblen

When you have what seems a good situation, don't rush into another at your earliest opportunity, but instead study it till you know every permutation and combination it holds emotionally for every one involved, both because the situation affects every character, and because every character may affect all the others. – Dramatic Technique by George Pierce Baker

The whole section has been written in illustration of the meaning of the word permutation rather than for any specific object in grammar. – The English Language by Robert Gordon Latham

Meantime, as life wears on, it proves a game of permutation and combination of all possible positions of the parties, to employ all the resources of each, and acquaint each with the weakness of the other.... – Emerson and Other Essays by John Jay Chapman

I was, however, perfectly fascinated with the mathematical rules of " combination, permutation and variation," but unhappily I could not give much time to their study, which I have regretted ever since. – Autobiography of Friedrich Froebel by Friedrich Froebel

There seems to be no good reason, however, why the term 'conversion by negation' should be thus restricted in its meaning; instead of being extended to the combination of permutation with conversion, no matter in what order the two processes may be performed. – Deductive Logic by St. George Stock

Free is it here from every permutation What from itself heaven in itself receiveth Can be of this the cause, and naught beside; Because that neither rain, nor hail, nor snow, Nor dew, nor hoar frost any higher falls Than the short, little stairway of three steps. – DivineComedyLongfellowsTranslationComplete by Dante Alighieri

There remained the possibility that the numerals belonged to some other safe, though I did not think so: those two odd crenellated figures could have nothing in common with any permutation lock. – The Paternoster Ruby by Charles Edmonds Walk

On the wall by the door hung a framed tariff, on which poached eggs in every permutation of number and combination of additional delicacies figured most prominently. – Carnival by Compton Mackenzie

In Donamon the first n stands for a process which resolves itself into permutation followed by simple conversion, the second for one which resolves itself into simple conversion followed by permutation according to the extended meaning which we have given to the term 'conversion by negation. – Deductive Logic by St. George Stock

The following are instances of the permutation of letters. – The English Language by Robert Gordon Latham