union

1 the act or an instance of joining two or more things into one the union of East Germany and West Germany that became possible after the fall of communism Synonyms combination, combining, connecting, connection, consolidation, coupling, junction, linking, merger, merging, unification Related Words agglomeration, amalgamation, blend, coalescence, commingling, compounding, fusion, intermingling, intermixture, mingling, mix, mixture, synthesis; reunification, reunion Near Antonyms detachment, divorcement, separation, severance Antonyms breakup, disconnection, dissolution, disunion, division, parting, partition, schism, scission, split

2 an association of persons, parties, or states for mutual assistance and protection in 1949 the U.S. and Canada joined their European allies in a transatlantic union to defend Western Europe from aggression by the Soviet Union Synonyms alliance, axis, bloc, block, coalition, combination, combine, confederation, federation, league, confederacyRelated Words cabal, conspiracy, junto; cartel, syndicate, trust; faction, front, fusion, side, wing; association, group, organization; affiliation, cooperative, partnership; circuit, conference

3 the state of having shared interests or efforts (as in social or business matters) the movie studio is producing the blockbuster in union with another studio because of the tremendous cost involved Synonyms affiliation, alliance, collaboration, confederation, connection, cooperation, hookup, liaison, linkup, partnership, relation, relationship, tie-up, associationRelated Words business, dealings, interaction; exchange, interconnection, interrelation, mutualism, reciprocity, symbiosis; incorporation, integration, merger, unification; affinity, attachment, closeness, intimacy, rapport, sympathy; kinship, oneness, solidarity, togetherness, unity; colleagueship, companionship, company, fellowship; bed, cahoots, leagueNear Antonyms breakup, dissolution, disunion; division, parting, separation, severance, split; alienation, divorce, estrangementAntonyms disaffiliation, dissociation