Noun partitioning has 2 senses

• partitioning(n = noun.cognition) breakdown - an analysis into mutually exclusive categories; Array
is a kind of analysis, analytic thinking
has particulars: resolution, resolving

• partitioning(n = noun.act) division, partition, sectionalisation, sectionalization, segmentation - the act of dividing or partitioning; separation by the creation of a boundary that divides or keeps apart; Array
is a kind of separation
has particulars: subdivision, septation, zoning
Derived forms verb partition₂, verb partition₁