grouping

verb

1. (form-of, gerund, participle, present)present participle and gerund of group

noun

1. (countable)A collection of things or people united as a group.

   “In bony, ribby regions of the earth, where at the base of high broken cliffs masses of rock lie strewn in fantastic groupings upon the plain, you will often discover images as of the petrified forms of the Leviathan partly merged in grass, which of a windy day breaks against them in a surf of green surges.”

2. (countable, uncountable)Combining into groups.
3. (countable, uncountable)Shot grouping.