An ordering of Permutations in which they are listed in increasing numerical order. For example, the Permutations of in lexicographic order are 123, 132, 213, 231, 312, and 321.
See also Transposition Order
References
Ruskey, F. ``Information on Combinations of a Set.''
http://sue.csc.uvic.ca/~cos/inf/comb/CombinationsInfo.html.