per ‧ mu ‧ ta ‧ tion /ˌpɜːmjʊˈteɪʃ ə n $ ˌpɜːr-/ BrE AmE noun [countable]
[ Date: 1300-1400 ; Language: Old French ; Origin: permutacion , from Latin , from permutare 'to change completely' ]
one of the different ways in which a number of things can be arranged:
a sandwich shop that sells every possible permutation of meat and bread
⇨ ↑ combination