noun

1. A usually preliminary meeting of party members to nominate candidates for public office or delegates to be sent a nominating convention, or to confer regarding policy.

2. A grouping of all the members of a legislature from the same party.

3. A political interest group by members of a legislative body.

Synonyms: parliamentary group

verb

1. To meet and participate in caucus.

2. To bring into or treat in caucus.