1 a an ordered arrangement or grouping of a set of numbers, items, etc. b any one of the range of possible groupings.
2 any combination or selection of a specified number of things from a larger group, esp. Brit. matches in a football pool.
Derivatives:
permutational adj.
Etymology: ME f. OF or f. L permutatio (as PERMUTE)
Useful english dictionary. 2012.