a small informal social gathering "there was an informal meeting in my living room"
Verb
become part of
become a member of a group or organization "He joined the Communist Party as a young man" - fall in
work together on a common enterprise of project "The soprano and the pianist did not get together very well" "We joined forces with another research group" - join forces
get together socially or for a specific purpose
get people together "assemble your colleagues" "get together all those who are interested in the project" "gather the close family members"