Conclave

n.
  1. The set of apartments within which the cardinals of the Roman Catholic Church are continuously secluded while engaged in choosing a pope.
  2. The body of cardinals shut up in the conclave for the election of a pope; hence, the body of cardinals.
  3. A private meeting; a close or secret assembly.
    4. To be in conclave ,
    to be engaged in a secret meeting; -- said of several, or a considerable number of, persons.