" of, relating to, or involving combinations; of, or relating to the arrangement of, operation on, and selection of discrete elements belonging to finite sets." (Webster's Collegiate Dictionary)
produced by a process of combining; as, a combinatorial explosion of possibilities; -- used especially in reference to mathematical or statistical processes of computing possible combinations.
Describes any process that is governed by a specific combination of factors (rather than by any single factor), with different combinations having different effects.