permutation


Concise Oxford English Dictionary © 2008 Oxford University Press:
permutation/pɜːmjuˈteɪʃn/
noun each of several possible ways in which a set or number of things can be ordered or arranged.

Mathematics the action of changing the arrangement of a set of items.

Brit. a selection of a specified number of matches in a football pool.

– derivatives
permutational adjective.
– origin ME (in the sense ‘exchange, barter’): via OFr. from L. permutatio(n-), from permutare (see permute).
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