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English definition of “permutation”

permutation

noun     /ˌpɜː.mjʊˈteɪ.ʃən/ US  /ˌpɝː.mjuː-/
[C usually plural] formal any of the various ways in which a set of things can be ordered : There are 120 permutations of the numbers 1, 2, 3, 4 and 5: for example , 1, 3, 2, 4, 5 or 5, 1, 4, 2, 3. He made 16 separate applications for tickets using various permutations of his children's names .Groups and collections of thingsVariety and mixtures [C] one of several different forms : The company has had five different names in its various permutations over the last few years .Possible and probableDifferent and difference
(Definition of permutation noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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