Русско-англо-русский юридический словарь

The term is also used in certain Commonwealth nations, including Australia, Canada, New Zealand and South Africa. However, when used in these countries, "caucus" is more usually a collective term for all members of a party sitting in Parliament, otherwise called a parliamentary group, rather than a word for a regular meeting of these members of Parliament. Thus, the Australian Federal Parliamentary Labor Party is commonly called "the Labor Caucus". (Wikipedia)

A parliamentary group, parliamentary caucus or political group is a group consisting of members of different political parties or independent politicians with similar ideologies. (Wikipedia)