private meeting of members of a party to select officers or decide policy
The caucus of the Liberal party will meet later this month to vote for a new party leader.
A meeting where COWS+disCUS therefore caucus is closed political (cows) meeting cau + cus sounds like can collector come to discuss. lets get together in a group and discuss about who will be elected. think of "RUCKUS" our politicians create in the parliament. sounds similar to CAUCUS