caucus >> /ˈkɔkəs/
Definition: [noun] (in some US states) a meeting at which local members of a political party register their preference among candidates running for office or select delegates to attend a convention.
Example: Hawaii holds its nominating caucuses next Tuesday
Definition: [noun] A conference of members of a legislative body who belong to a particular party or faction.
Example: Mr. Kerry attended the morning caucus in the Old Senate Chamber where his fellow Democrats selected the new minority leadership
Definition: [noun] A group within an organization or political party which meets independently to discuss strategy or tactics.
Example: up to fifty caucuses met daily on conference grounds to discuss lobbying strategies
Definition: [intransitive verb] Hold or form a legislative caucus.
Example: Republicans briefly caucused