maingroup
nounUK /ˈmeɪn ɡruːp/
US /ˈmeɪn ɡruːp/
The main group is the biggest or most important group of people or things.
Our class is the main group going on the field trip.
OTHER MEANINGS
2. The largest set of related items in a collection.
The main group of toys is in the big box.
3. The group that most people belong to in a study or survey.
The main group of students chose pizza for lunch.
4. The central part of a larger organization or system.
The main group of workers meets every Monday.