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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 six separate applications for a total of 39,000 shares, using permutations of his surname and Christian 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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