1 [intransitive and transitive]
to come together and form a group, or to arrange things or people together in a group
group (something) together/round/into etc
The photo shows four men grouped round a jeep.
Different flowers can be grouped together to make a colourful display.
small producers who group together to sell their produce
2 [transitive always + adverb/preposition]
to divide people or things into groups according to a system:
We were grouped into six age bands.
We've grouped the questions under three headings.