say it: GROO-ping
grouping is a noun meaning "any number of entities (members) considered as a unit". It carries 3 recorded senses.
any number of entities (members) considered as a unit
the activity of putting things together in groups
a system for classifying things into groups
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for grouping come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.