Noun group action has 1 sense

• group action(n = noun.act) Array - action taken by a group of people; Array
is a kind of event, act, deed, human action, human activity
has particulars: vote, procession, action, military action, battle, conflict, struggle, revolution, social activity, communalism, alliance, confederation, decolonisation, decolonization, disbandment, disestablishment, dealing, dealings, transaction, stampede, social control, coup, coup d'etat, putsch, takeover, internationalisation, internationalization, nationalisation, nationalization, exchange, interchange, exchange, rally, compliance, submission, competition, contention, rivalry, resistance, nonresistance, due process, due process of law, action, legalisation, legalization, legitimation, separation, desegregation, integrating, integration, cooperation, brainstorming, assemblage, assembly, gathering, attendance, attending, nonattendance, getting even, paying back, return, democratisation, democratization, engagement, involution, involvement, participation, non-engagement, non-involvement, nonparticipation, ethnic cleansing, socialisation, socialization, restoration