caucusEnglishOxford American Thesauruscaucus noun 1 in North America & NZ the Democratic caucus in the House: parliamentary party. 2 in North America & NZ caucuses will be held in eleven states: meeting, assembly, gathering, congress, conference, convention, rally, conclave, congregation, convocation, synod, council, session, parley; informal get-together. 3 in the UK the right-wing caucus in the Cabinet: faction, camp, bloc, group, gang, set, band, ring, party, league, cabal, camarilla, clique, coterie, junta, pressure group; British ginger group; historical junto.