Definition of: caucus

(kô′kəs) noun
1. A private or preliminary meeting of members of a political party to select candidates or plan a campaign; a primary.
2. Brit. A political committee or other body in charge of shaping political policies, or of a local canvass or election.
—v.i. cau·cused or ·cussed, ·cus·ing or ·cus·sing To meet in or hold a caucus, [from the Caucus Club, Boston, Mass., prob. <Algonquian caucawasu advisor]