1APM [countable] a number of people, things, or organizations that do something together or have the same interests, qualities, or features
a loose grouping (=informal and not well organized) of anti-capitalist protesters
political/social/economic etc grouping
During this period the family unit becomes the natural social grouping.
During this period the family unit becomes the natural social grouping.
a loose grouping (=informal and not well organized) of anti-capitalist protesters2 [uncountable] the act of putting people or things into groups :
the grouping of students by ability
the grouping of students by ability