permutation Meaning in Cambridge English Dictionary
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Meaning of "permutation" - English Dictionary

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permutationnoun

uk   /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. [C] one of several different forms: The company has had five different names in its various permutations over the last few years.
(Definition of permutation from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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