From Longman Dictionary of Contemporary Englishcaucuscau‧cus /ˈkɔːkəs $ ˈkɒː-/ noun [countable] 1 PPGROUP OF PEOPLEa meeting of the members of a political party to choose people to represent them in a larger meeting, election etc2 American English an organized group of people who have similar aims or interests, especially political ones the chairman of the Congressional Black Caucus
Examples from the Corpus
caucus• Among those considered most likely to attend a caucus, there appears to be less support for Forbes than the polls indicate.• The congressional black caucus has lost its way since the Republicans took control of House and Senate.• Together, these two antiabortion candidates now stand to collect about 20 percent of the Iowa caucus.• The issue was the subject of heated debate in a weekly morning caucus session.• Under Republican caucus rules, censuring Gingrich would force him to give up the office of speaker.Origin caucus (1700-1800) Probably from an Algonquian language 